What is the name of these little plastic things that protect wires from being cut into by the sharp edges of...











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What is the name of these little plastic things that protect wires from being cut into by the sharp edges of a drilled hole?



enter image description hereenter image description here










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  • 13




    In addition to all the good answers: if you are looking to purchase a grommet/bushing specifically for preventing someone damaging internal parts by pulling on the cable, you'll want to do a search for stress relief or strain relief bushing.
    – Eric Lippert
    Nov 12 at 15:43










  • Any way to put the comprehensive answer into the FAQ listing?
    – KalleMP
    2 days ago















up vote
58
down vote

favorite
9












What is the name of these little plastic things that protect wires from being cut into by the sharp edges of a drilled hole?



enter image description hereenter image description here










share|improve this question




















  • 13




    In addition to all the good answers: if you are looking to purchase a grommet/bushing specifically for preventing someone damaging internal parts by pulling on the cable, you'll want to do a search for stress relief or strain relief bushing.
    – Eric Lippert
    Nov 12 at 15:43










  • Any way to put the comprehensive answer into the FAQ listing?
    – KalleMP
    2 days ago













up vote
58
down vote

favorite
9









up vote
58
down vote

favorite
9






9





What is the name of these little plastic things that protect wires from being cut into by the sharp edges of a drilled hole?



enter image description hereenter image description here










share|improve this question















What is the name of these little plastic things that protect wires from being cut into by the sharp edges of a drilled hole?



enter image description hereenter image description here







identification wiring terminology






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share|improve this question













share|improve this question




share|improve this question








edited yesterday









chicks

11716




11716










asked Nov 12 at 7:31









Zhro

1,1761315




1,1761315








  • 13




    In addition to all the good answers: if you are looking to purchase a grommet/bushing specifically for preventing someone damaging internal parts by pulling on the cable, you'll want to do a search for stress relief or strain relief bushing.
    – Eric Lippert
    Nov 12 at 15:43










  • Any way to put the comprehensive answer into the FAQ listing?
    – KalleMP
    2 days ago














  • 13




    In addition to all the good answers: if you are looking to purchase a grommet/bushing specifically for preventing someone damaging internal parts by pulling on the cable, you'll want to do a search for stress relief or strain relief bushing.
    – Eric Lippert
    Nov 12 at 15:43










  • Any way to put the comprehensive answer into the FAQ listing?
    – KalleMP
    2 days ago








13




13




In addition to all the good answers: if you are looking to purchase a grommet/bushing specifically for preventing someone damaging internal parts by pulling on the cable, you'll want to do a search for stress relief or strain relief bushing.
– Eric Lippert
Nov 12 at 15:43




In addition to all the good answers: if you are looking to purchase a grommet/bushing specifically for preventing someone damaging internal parts by pulling on the cable, you'll want to do a search for stress relief or strain relief bushing.
– Eric Lippert
Nov 12 at 15:43












Any way to put the comprehensive answer into the FAQ listing?
– KalleMP
2 days ago




Any way to put the comprehensive answer into the FAQ listing?
– KalleMP
2 days ago










5 Answers
5






active

oldest

votes

















up vote
161
down vote













That's a grommet, not to be confused with Gromit.



enter image description here



Gromit, of Wallace and Gromit fame.






share|improve this answer



















  • 8




    made my day :-)
    – Blup1980
    Nov 12 at 8:19






  • 3




    Got our "funny" head on today? plus 1... :)
    – Solar Mike
    Nov 12 at 9:09






  • 29




    Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
    – Wossname
    Nov 12 at 10:18






  • 14




    @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
    – Martin Bonner
    Nov 13 at 9:43






  • 8




    @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
    – John U
    Nov 13 at 12:28


















up vote
95
down vote



accepted










Summary:



I've been doing a lot of research on this and found several excellent definitions from CableOrganizer that has helped to clarify a lot of the confusion I've been having. I'll lay this out as clearly as I can to cite the differences between grommets and bushings which has made it easier to find the correct part I was looking for.





Is it a grommet or a bushing?



The terms "grommet" and "bushing" are pretty open in terms of their meaning, and depending on their application, but typically both words refer to a piece of material, usually circular in shape, that provides a buffer between two areas that can serve many different purposes, from insulation to vibration resistance to protection from abrasion and friction.1



A grommet is basically just a rubber bumper that protects cables from the hard edges or sharp corners of whatever surface it may be passing between.



enter image description here



What's is the purpose of grommets and bushings?



When running your cables through small openings or around sharp curves you will encounter rough metal or wooden edges that may damage or break your cables. These rubber grommets provide an abrasion resistant cushion around these small openings and sharp edges to protect your wiring.



A bushing is similar to a grommet and serves the function, to protect a cable from damage, but are notably more complex. These additional features can provide extra protection and functionality beyond a simple rubber pass-though.2



Examples of common bushings





  • PVC Bushings



    Other bushings are a bit more complex in their design. Rather than a simple rubber circle, many bushings have different features that help give a little extra protection or added functionality. Non-metallic wire bushings, for example, are essentially similar to rubber grommets, though they're made from PVC and feature a threaded pattern that allows them to install into surfaces more securely.1




enter image description here





  • Snap Bushings



    Snap bushings are so called because they can snap into the surface and lock into place once installed, thanks to the design of the outer edge that allows portions to expand once placed into the desired hole.



    Many snap bushings are simple circular pass-throughs, but others feature "wings" or "shutters" which are flaps that help keep cables from being too loose in the pass-through, keeping them centered and also protecting them from too much vibration and shock.1




enter image description here





  • Snub Bushings



    Taking it a step further are snub bushings, which have a thick split opening that will close around a cable once it's snapped into place, securing it and ensuring that it doesn't move. While this provides solid insulation and retention, it also means only a single cable can be properly secured in each bushing, rather than a bundle.1




enter image description here





  • Open Bushings



    An open bushing is a grommet that is not a closed circle, but rather contains a slit that divides the circle when not installed. This allows it to do a few things closed grommets and bushings can't. Cables can be installed with a side-entry method, instead of a feed-through, for example. Additionally, they can be installed into pre-existing holes, or along pre-existing cable runs.1




enter image description here



Steve also mentioned grommet strips, also sometimes referred to as "edging", and can be found with or without adhesive.



enter image description here



enter image description here





What is the identity of the part in the question?



The bushing from my original question ended up being a Heyco snap bushing SB 375-4 (part no. 2030) with an inside diameter of 0.27" (6.8mm). A complete catalog is available online and parts can be sourced from Mouser Electronics.



Note that an inside diameter of 0.27" is an imperial variation with the next closest metric diameter being 7mm which may have a different outter diameter.






share|improve this answer



















  • 4




    Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
    – JPhi1618
    Nov 12 at 17:19










  • I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
    – mbrig
    Nov 12 at 22:31






  • 2




    Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
    – rrauenza
    Nov 12 at 23:59






  • 1




    duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
    – YetAnotherRandomUser
    Nov 13 at 2:18






  • 1




    You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
    – chasly from UK
    10 hours ago


















up vote
25
down vote













They are called grommets. You can also get grommet strip.






share|improve this answer




























    up vote
    23
    down vote













    Everyone's already identified basic grommets but I would add that, in the example of mains cable, there are specifically designed (and often legally required) cable grips which not only prevent chafing but also prevent the cable being pulled through.



    These are significantly different to general-purpose grommets so it's worth knowing the difference and why you might use one or the other.



    Edit: By request, this is an example of a common form of cable grip/gland used to retain fixed mains cables in many appliances:



    enter image description here



    RS-Components Stock No. 136-1750






    share|improve this answer























    • Can you provide an example image of cable grips?
      – Zhro
      Nov 12 at 11:45












    • Yes - updated my answer.
      – John U
      Nov 12 at 12:31


















    up vote
    1
    down vote













    They're called "Strain Relief Bushings"



    Strain Relief Bushing






    share|improve this answer








    New contributor




    Bill Simpson is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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      5 Answers
      5






      active

      oldest

      votes








      5 Answers
      5






      active

      oldest

      votes









      active

      oldest

      votes






      active

      oldest

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      up vote
      161
      down vote













      That's a grommet, not to be confused with Gromit.



      enter image description here



      Gromit, of Wallace and Gromit fame.






      share|improve this answer



















      • 8




        made my day :-)
        – Blup1980
        Nov 12 at 8:19






      • 3




        Got our "funny" head on today? plus 1... :)
        – Solar Mike
        Nov 12 at 9:09






      • 29




        Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
        – Wossname
        Nov 12 at 10:18






      • 14




        @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
        – Martin Bonner
        Nov 13 at 9:43






      • 8




        @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
        – John U
        Nov 13 at 12:28















      up vote
      161
      down vote













      That's a grommet, not to be confused with Gromit.



      enter image description here



      Gromit, of Wallace and Gromit fame.






      share|improve this answer



















      • 8




        made my day :-)
        – Blup1980
        Nov 12 at 8:19






      • 3




        Got our "funny" head on today? plus 1... :)
        – Solar Mike
        Nov 12 at 9:09






      • 29




        Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
        – Wossname
        Nov 12 at 10:18






      • 14




        @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
        – Martin Bonner
        Nov 13 at 9:43






      • 8




        @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
        – John U
        Nov 13 at 12:28













      up vote
      161
      down vote










      up vote
      161
      down vote









      That's a grommet, not to be confused with Gromit.



      enter image description here



      Gromit, of Wallace and Gromit fame.






      share|improve this answer














      That's a grommet, not to be confused with Gromit.



      enter image description here



      Gromit, of Wallace and Gromit fame.







      share|improve this answer














      share|improve this answer



      share|improve this answer








      edited yesterday









      Community

      1




      1










      answered Nov 12 at 8:15









      Transistor

      78.2k777171




      78.2k777171








      • 8




        made my day :-)
        – Blup1980
        Nov 12 at 8:19






      • 3




        Got our "funny" head on today? plus 1... :)
        – Solar Mike
        Nov 12 at 9:09






      • 29




        Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
        – Wossname
        Nov 12 at 10:18






      • 14




        @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
        – Martin Bonner
        Nov 13 at 9:43






      • 8




        @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
        – John U
        Nov 13 at 12:28














      • 8




        made my day :-)
        – Blup1980
        Nov 12 at 8:19






      • 3




        Got our "funny" head on today? plus 1... :)
        – Solar Mike
        Nov 12 at 9:09






      • 29




        Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
        – Wossname
        Nov 12 at 10:18






      • 14




        @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
        – Martin Bonner
        Nov 13 at 9:43






      • 8




        @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
        – John U
        Nov 13 at 12:28








      8




      8




      made my day :-)
      – Blup1980
      Nov 12 at 8:19




      made my day :-)
      – Blup1980
      Nov 12 at 8:19




      3




      3




      Got our "funny" head on today? plus 1... :)
      – Solar Mike
      Nov 12 at 9:09




      Got our "funny" head on today? plus 1... :)
      – Solar Mike
      Nov 12 at 9:09




      29




      29




      Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
      – Wossname
      Nov 12 at 10:18




      Check the datasheet before buying them though, some are compatible with Wensleydale, some are not.
      – Wossname
      Nov 12 at 10:18




      14




      14




      @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
      – Martin Bonner
      Nov 13 at 9:43




      @dlatikay - no. Grommet does not mean washer, disc, thimble etc. There may be 30 German words whose meaning overlaps with "grommet", but that does not mean that the English technical term has more than one meaning.
      – Martin Bonner
      Nov 13 at 9:43




      8




      8




      @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
      – John U
      Nov 13 at 12:28




      @pipe - are you worried that OP is going to fit a claymation dog to an electrical appliance? I can hear the voice of Peter Sallis now - "It's the wrong grommet, Grommit! The wrong grommet!"
      – John U
      Nov 13 at 12:28












      up vote
      95
      down vote



      accepted










      Summary:



      I've been doing a lot of research on this and found several excellent definitions from CableOrganizer that has helped to clarify a lot of the confusion I've been having. I'll lay this out as clearly as I can to cite the differences between grommets and bushings which has made it easier to find the correct part I was looking for.





      Is it a grommet or a bushing?



      The terms "grommet" and "bushing" are pretty open in terms of their meaning, and depending on their application, but typically both words refer to a piece of material, usually circular in shape, that provides a buffer between two areas that can serve many different purposes, from insulation to vibration resistance to protection from abrasion and friction.1



      A grommet is basically just a rubber bumper that protects cables from the hard edges or sharp corners of whatever surface it may be passing between.



      enter image description here



      What's is the purpose of grommets and bushings?



      When running your cables through small openings or around sharp curves you will encounter rough metal or wooden edges that may damage or break your cables. These rubber grommets provide an abrasion resistant cushion around these small openings and sharp edges to protect your wiring.



      A bushing is similar to a grommet and serves the function, to protect a cable from damage, but are notably more complex. These additional features can provide extra protection and functionality beyond a simple rubber pass-though.2



      Examples of common bushings





      • PVC Bushings



        Other bushings are a bit more complex in their design. Rather than a simple rubber circle, many bushings have different features that help give a little extra protection or added functionality. Non-metallic wire bushings, for example, are essentially similar to rubber grommets, though they're made from PVC and feature a threaded pattern that allows them to install into surfaces more securely.1




      enter image description here





      • Snap Bushings



        Snap bushings are so called because they can snap into the surface and lock into place once installed, thanks to the design of the outer edge that allows portions to expand once placed into the desired hole.



        Many snap bushings are simple circular pass-throughs, but others feature "wings" or "shutters" which are flaps that help keep cables from being too loose in the pass-through, keeping them centered and also protecting them from too much vibration and shock.1




      enter image description here





      • Snub Bushings



        Taking it a step further are snub bushings, which have a thick split opening that will close around a cable once it's snapped into place, securing it and ensuring that it doesn't move. While this provides solid insulation and retention, it also means only a single cable can be properly secured in each bushing, rather than a bundle.1




      enter image description here





      • Open Bushings



        An open bushing is a grommet that is not a closed circle, but rather contains a slit that divides the circle when not installed. This allows it to do a few things closed grommets and bushings can't. Cables can be installed with a side-entry method, instead of a feed-through, for example. Additionally, they can be installed into pre-existing holes, or along pre-existing cable runs.1




      enter image description here



      Steve also mentioned grommet strips, also sometimes referred to as "edging", and can be found with or without adhesive.



      enter image description here



      enter image description here





      What is the identity of the part in the question?



      The bushing from my original question ended up being a Heyco snap bushing SB 375-4 (part no. 2030) with an inside diameter of 0.27" (6.8mm). A complete catalog is available online and parts can be sourced from Mouser Electronics.



      Note that an inside diameter of 0.27" is an imperial variation with the next closest metric diameter being 7mm which may have a different outter diameter.






      share|improve this answer



















      • 4




        Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
        – JPhi1618
        Nov 12 at 17:19










      • I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
        – mbrig
        Nov 12 at 22:31






      • 2




        Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
        – rrauenza
        Nov 12 at 23:59






      • 1




        duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
        – YetAnotherRandomUser
        Nov 13 at 2:18






      • 1




        You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
        – chasly from UK
        10 hours ago















      up vote
      95
      down vote



      accepted










      Summary:



      I've been doing a lot of research on this and found several excellent definitions from CableOrganizer that has helped to clarify a lot of the confusion I've been having. I'll lay this out as clearly as I can to cite the differences between grommets and bushings which has made it easier to find the correct part I was looking for.





      Is it a grommet or a bushing?



      The terms "grommet" and "bushing" are pretty open in terms of their meaning, and depending on their application, but typically both words refer to a piece of material, usually circular in shape, that provides a buffer between two areas that can serve many different purposes, from insulation to vibration resistance to protection from abrasion and friction.1



      A grommet is basically just a rubber bumper that protects cables from the hard edges or sharp corners of whatever surface it may be passing between.



      enter image description here



      What's is the purpose of grommets and bushings?



      When running your cables through small openings or around sharp curves you will encounter rough metal or wooden edges that may damage or break your cables. These rubber grommets provide an abrasion resistant cushion around these small openings and sharp edges to protect your wiring.



      A bushing is similar to a grommet and serves the function, to protect a cable from damage, but are notably more complex. These additional features can provide extra protection and functionality beyond a simple rubber pass-though.2



      Examples of common bushings





      • PVC Bushings



        Other bushings are a bit more complex in their design. Rather than a simple rubber circle, many bushings have different features that help give a little extra protection or added functionality. Non-metallic wire bushings, for example, are essentially similar to rubber grommets, though they're made from PVC and feature a threaded pattern that allows them to install into surfaces more securely.1




      enter image description here





      • Snap Bushings



        Snap bushings are so called because they can snap into the surface and lock into place once installed, thanks to the design of the outer edge that allows portions to expand once placed into the desired hole.



        Many snap bushings are simple circular pass-throughs, but others feature "wings" or "shutters" which are flaps that help keep cables from being too loose in the pass-through, keeping them centered and also protecting them from too much vibration and shock.1




      enter image description here





      • Snub Bushings



        Taking it a step further are snub bushings, which have a thick split opening that will close around a cable once it's snapped into place, securing it and ensuring that it doesn't move. While this provides solid insulation and retention, it also means only a single cable can be properly secured in each bushing, rather than a bundle.1




      enter image description here





      • Open Bushings



        An open bushing is a grommet that is not a closed circle, but rather contains a slit that divides the circle when not installed. This allows it to do a few things closed grommets and bushings can't. Cables can be installed with a side-entry method, instead of a feed-through, for example. Additionally, they can be installed into pre-existing holes, or along pre-existing cable runs.1




      enter image description here



      Steve also mentioned grommet strips, also sometimes referred to as "edging", and can be found with or without adhesive.



      enter image description here



      enter image description here





      What is the identity of the part in the question?



      The bushing from my original question ended up being a Heyco snap bushing SB 375-4 (part no. 2030) with an inside diameter of 0.27" (6.8mm). A complete catalog is available online and parts can be sourced from Mouser Electronics.



      Note that an inside diameter of 0.27" is an imperial variation with the next closest metric diameter being 7mm which may have a different outter diameter.






      share|improve this answer



















      • 4




        Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
        – JPhi1618
        Nov 12 at 17:19










      • I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
        – mbrig
        Nov 12 at 22:31






      • 2




        Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
        – rrauenza
        Nov 12 at 23:59






      • 1




        duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
        – YetAnotherRandomUser
        Nov 13 at 2:18






      • 1




        You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
        – chasly from UK
        10 hours ago













      up vote
      95
      down vote



      accepted







      up vote
      95
      down vote



      accepted






      Summary:



      I've been doing a lot of research on this and found several excellent definitions from CableOrganizer that has helped to clarify a lot of the confusion I've been having. I'll lay this out as clearly as I can to cite the differences between grommets and bushings which has made it easier to find the correct part I was looking for.





      Is it a grommet or a bushing?



      The terms "grommet" and "bushing" are pretty open in terms of their meaning, and depending on their application, but typically both words refer to a piece of material, usually circular in shape, that provides a buffer between two areas that can serve many different purposes, from insulation to vibration resistance to protection from abrasion and friction.1



      A grommet is basically just a rubber bumper that protects cables from the hard edges or sharp corners of whatever surface it may be passing between.



      enter image description here



      What's is the purpose of grommets and bushings?



      When running your cables through small openings or around sharp curves you will encounter rough metal or wooden edges that may damage or break your cables. These rubber grommets provide an abrasion resistant cushion around these small openings and sharp edges to protect your wiring.



      A bushing is similar to a grommet and serves the function, to protect a cable from damage, but are notably more complex. These additional features can provide extra protection and functionality beyond a simple rubber pass-though.2



      Examples of common bushings





      • PVC Bushings



        Other bushings are a bit more complex in their design. Rather than a simple rubber circle, many bushings have different features that help give a little extra protection or added functionality. Non-metallic wire bushings, for example, are essentially similar to rubber grommets, though they're made from PVC and feature a threaded pattern that allows them to install into surfaces more securely.1




      enter image description here





      • Snap Bushings



        Snap bushings are so called because they can snap into the surface and lock into place once installed, thanks to the design of the outer edge that allows portions to expand once placed into the desired hole.



        Many snap bushings are simple circular pass-throughs, but others feature "wings" or "shutters" which are flaps that help keep cables from being too loose in the pass-through, keeping them centered and also protecting them from too much vibration and shock.1




      enter image description here





      • Snub Bushings



        Taking it a step further are snub bushings, which have a thick split opening that will close around a cable once it's snapped into place, securing it and ensuring that it doesn't move. While this provides solid insulation and retention, it also means only a single cable can be properly secured in each bushing, rather than a bundle.1




      enter image description here





      • Open Bushings



        An open bushing is a grommet that is not a closed circle, but rather contains a slit that divides the circle when not installed. This allows it to do a few things closed grommets and bushings can't. Cables can be installed with a side-entry method, instead of a feed-through, for example. Additionally, they can be installed into pre-existing holes, or along pre-existing cable runs.1




      enter image description here



      Steve also mentioned grommet strips, also sometimes referred to as "edging", and can be found with or without adhesive.



      enter image description here



      enter image description here





      What is the identity of the part in the question?



      The bushing from my original question ended up being a Heyco snap bushing SB 375-4 (part no. 2030) with an inside diameter of 0.27" (6.8mm). A complete catalog is available online and parts can be sourced from Mouser Electronics.



      Note that an inside diameter of 0.27" is an imperial variation with the next closest metric diameter being 7mm which may have a different outter diameter.






      share|improve this answer














      Summary:



      I've been doing a lot of research on this and found several excellent definitions from CableOrganizer that has helped to clarify a lot of the confusion I've been having. I'll lay this out as clearly as I can to cite the differences between grommets and bushings which has made it easier to find the correct part I was looking for.





      Is it a grommet or a bushing?



      The terms "grommet" and "bushing" are pretty open in terms of their meaning, and depending on their application, but typically both words refer to a piece of material, usually circular in shape, that provides a buffer between two areas that can serve many different purposes, from insulation to vibration resistance to protection from abrasion and friction.1



      A grommet is basically just a rubber bumper that protects cables from the hard edges or sharp corners of whatever surface it may be passing between.



      enter image description here



      What's is the purpose of grommets and bushings?



      When running your cables through small openings or around sharp curves you will encounter rough metal or wooden edges that may damage or break your cables. These rubber grommets provide an abrasion resistant cushion around these small openings and sharp edges to protect your wiring.



      A bushing is similar to a grommet and serves the function, to protect a cable from damage, but are notably more complex. These additional features can provide extra protection and functionality beyond a simple rubber pass-though.2



      Examples of common bushings





      • PVC Bushings



        Other bushings are a bit more complex in their design. Rather than a simple rubber circle, many bushings have different features that help give a little extra protection or added functionality. Non-metallic wire bushings, for example, are essentially similar to rubber grommets, though they're made from PVC and feature a threaded pattern that allows them to install into surfaces more securely.1




      enter image description here





      • Snap Bushings



        Snap bushings are so called because they can snap into the surface and lock into place once installed, thanks to the design of the outer edge that allows portions to expand once placed into the desired hole.



        Many snap bushings are simple circular pass-throughs, but others feature "wings" or "shutters" which are flaps that help keep cables from being too loose in the pass-through, keeping them centered and also protecting them from too much vibration and shock.1




      enter image description here





      • Snub Bushings



        Taking it a step further are snub bushings, which have a thick split opening that will close around a cable once it's snapped into place, securing it and ensuring that it doesn't move. While this provides solid insulation and retention, it also means only a single cable can be properly secured in each bushing, rather than a bundle.1




      enter image description here





      • Open Bushings



        An open bushing is a grommet that is not a closed circle, but rather contains a slit that divides the circle when not installed. This allows it to do a few things closed grommets and bushings can't. Cables can be installed with a side-entry method, instead of a feed-through, for example. Additionally, they can be installed into pre-existing holes, or along pre-existing cable runs.1




      enter image description here



      Steve also mentioned grommet strips, also sometimes referred to as "edging", and can be found with or without adhesive.



      enter image description here



      enter image description here





      What is the identity of the part in the question?



      The bushing from my original question ended up being a Heyco snap bushing SB 375-4 (part no. 2030) with an inside diameter of 0.27" (6.8mm). A complete catalog is available online and parts can be sourced from Mouser Electronics.



      Note that an inside diameter of 0.27" is an imperial variation with the next closest metric diameter being 7mm which may have a different outter diameter.







      share|improve this answer














      share|improve this answer



      share|improve this answer








      edited Nov 12 at 11:26

























      answered Nov 12 at 11:06









      Zhro

      1,1761315




      1,1761315








      • 4




        Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
        – JPhi1618
        Nov 12 at 17:19










      • I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
        – mbrig
        Nov 12 at 22:31






      • 2




        Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
        – rrauenza
        Nov 12 at 23:59






      • 1




        duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
        – YetAnotherRandomUser
        Nov 13 at 2:18






      • 1




        You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
        – chasly from UK
        10 hours ago














      • 4




        Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
        – JPhi1618
        Nov 12 at 17:19










      • I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
        – mbrig
        Nov 12 at 22:31






      • 2




        Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
        – rrauenza
        Nov 12 at 23:59






      • 1




        duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
        – YetAnotherRandomUser
        Nov 13 at 2:18






      • 1




        You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
        – chasly from UK
        10 hours ago








      4




      4




      Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
      – JPhi1618
      Nov 12 at 17:19




      Good information here. In plumbing, the term "bushing" is used to refer to a pipe fitting that reduces the size of another female pipe fitting. In PVC they come in threaded and solvent welded versions, and in metal pipe they are threaded only.
      – JPhi1618
      Nov 12 at 17:19












      I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
      – mbrig
      Nov 12 at 22:31




      I've only ever heard these called bushings, not grommets, so thanks for making the connection for me.
      – mbrig
      Nov 12 at 22:31




      2




      2




      Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
      – rrauenza
      Nov 12 at 23:59




      Would you also like to include cable glands? en.wikipedia.org/wiki/Cable_gland
      – rrauenza
      Nov 12 at 23:59




      1




      1




      duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
      – YetAnotherRandomUser
      Nov 13 at 2:18




      duuuuuuuuuuuuuuuuuude I was never able to find any "grommet strips" because I would have never thought they were called that. Now that I don't need them, of course I find out what they are called! SMH
      – YetAnotherRandomUser
      Nov 13 at 2:18




      1




      1




      You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
      – chasly from UK
      10 hours ago




      You've missed an important type of grommet - the grooved grommet. This is commonly used in the situation you show. 5.imimg.com/data5/XK/HN/MY-41191648/…
      – chasly from UK
      10 hours ago










      up vote
      25
      down vote













      They are called grommets. You can also get grommet strip.






      share|improve this answer

























        up vote
        25
        down vote













        They are called grommets. You can also get grommet strip.






        share|improve this answer























          up vote
          25
          down vote










          up vote
          25
          down vote









          They are called grommets. You can also get grommet strip.






          share|improve this answer












          They are called grommets. You can also get grommet strip.







          share|improve this answer












          share|improve this answer



          share|improve this answer










          answered Nov 12 at 7:42









          Steve Hubbard

          70716




          70716






















              up vote
              23
              down vote













              Everyone's already identified basic grommets but I would add that, in the example of mains cable, there are specifically designed (and often legally required) cable grips which not only prevent chafing but also prevent the cable being pulled through.



              These are significantly different to general-purpose grommets so it's worth knowing the difference and why you might use one or the other.



              Edit: By request, this is an example of a common form of cable grip/gland used to retain fixed mains cables in many appliances:



              enter image description here



              RS-Components Stock No. 136-1750






              share|improve this answer























              • Can you provide an example image of cable grips?
                – Zhro
                Nov 12 at 11:45












              • Yes - updated my answer.
                – John U
                Nov 12 at 12:31















              up vote
              23
              down vote













              Everyone's already identified basic grommets but I would add that, in the example of mains cable, there are specifically designed (and often legally required) cable grips which not only prevent chafing but also prevent the cable being pulled through.



              These are significantly different to general-purpose grommets so it's worth knowing the difference and why you might use one or the other.



              Edit: By request, this is an example of a common form of cable grip/gland used to retain fixed mains cables in many appliances:



              enter image description here



              RS-Components Stock No. 136-1750






              share|improve this answer























              • Can you provide an example image of cable grips?
                – Zhro
                Nov 12 at 11:45












              • Yes - updated my answer.
                – John U
                Nov 12 at 12:31













              up vote
              23
              down vote










              up vote
              23
              down vote









              Everyone's already identified basic grommets but I would add that, in the example of mains cable, there are specifically designed (and often legally required) cable grips which not only prevent chafing but also prevent the cable being pulled through.



              These are significantly different to general-purpose grommets so it's worth knowing the difference and why you might use one or the other.



              Edit: By request, this is an example of a common form of cable grip/gland used to retain fixed mains cables in many appliances:



              enter image description here



              RS-Components Stock No. 136-1750






              share|improve this answer














              Everyone's already identified basic grommets but I would add that, in the example of mains cable, there are specifically designed (and often legally required) cable grips which not only prevent chafing but also prevent the cable being pulled through.



              These are significantly different to general-purpose grommets so it's worth knowing the difference and why you might use one or the other.



              Edit: By request, this is an example of a common form of cable grip/gland used to retain fixed mains cables in many appliances:



              enter image description here



              RS-Components Stock No. 136-1750







              share|improve this answer














              share|improve this answer



              share|improve this answer








              edited Nov 12 at 12:31

























              answered Nov 12 at 11:40









              John U

              5,77911130




              5,77911130












              • Can you provide an example image of cable grips?
                – Zhro
                Nov 12 at 11:45












              • Yes - updated my answer.
                – John U
                Nov 12 at 12:31


















              • Can you provide an example image of cable grips?
                – Zhro
                Nov 12 at 11:45












              • Yes - updated my answer.
                – John U
                Nov 12 at 12:31
















              Can you provide an example image of cable grips?
              – Zhro
              Nov 12 at 11:45






              Can you provide an example image of cable grips?
              – Zhro
              Nov 12 at 11:45














              Yes - updated my answer.
              – John U
              Nov 12 at 12:31




              Yes - updated my answer.
              – John U
              Nov 12 at 12:31










              up vote
              1
              down vote













              They're called "Strain Relief Bushings"



              Strain Relief Bushing






              share|improve this answer








              New contributor




              Bill Simpson is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
              Check out our Code of Conduct.






















                up vote
                1
                down vote













                They're called "Strain Relief Bushings"



                Strain Relief Bushing






                share|improve this answer








                New contributor




                Bill Simpson is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                Check out our Code of Conduct.




















                  up vote
                  1
                  down vote










                  up vote
                  1
                  down vote









                  They're called "Strain Relief Bushings"



                  Strain Relief Bushing






                  share|improve this answer








                  New contributor




                  Bill Simpson is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                  Check out our Code of Conduct.









                  They're called "Strain Relief Bushings"



                  Strain Relief Bushing







                  share|improve this answer








                  New contributor




                  Bill Simpson is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                  Check out our Code of Conduct.









                  share|improve this answer



                  share|improve this answer






                  New contributor




                  Bill Simpson is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                  Check out our Code of Conduct.









                  answered 23 hours ago









                  Bill Simpson

                  212




                  212




                  New contributor




                  Bill Simpson is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                  Check out our Code of Conduct.





                  New contributor





                  Bill Simpson is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                  Check out our Code of Conduct.






                  Bill Simpson is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
                  Check out our Code of Conduct.






























                       

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