Rubber Grommet Size Chart (Printable)
Every rubber grommet we stock, sorted by the hole it fits. Highlighted rows have case pricing.
| Fits hole | ID | Panel up to (groove) | OD | Part |
|---|---|---|---|---|
| 3/16" | 1/8" | 1/16" | 5/16" | RG341831619_S |
| 1/4" | 1/8" | 1/16" | 11/32" | RG30181401 |
| 9/32" | 3/16" | 3/32" | 7/16" | RG3031693253 |
| 5/16" | 3/16" | 1/16" | 1/2" | RG3031651649 Case pricing |
| 5/16" | 3/16" | 1/8" | 7/16" | RG3131651646 |
| 5/16" | 3/16" | 1/4" | 7/16" | RG3131651605 |
| 3/8" | 1/4" | — | — | RB3814 (flanged bushing) |
| 3/8" | 1/4" | 1/16" | 9/16" | RG31141163865 |
| 3/8" | 3/16" | 1/16" | 9/16" | RG353163831 |
| 3/8" | 1/4" | 3/32" | 1/2" | RG31143864 |
| 3/8" | 1/8" | 3/32" | 1/2" | RG30183323897 |
| 3/8" | 1/4" | 1/8" | 1/2" | RG3114183866 |
| 3/8" | 5/16" | 3/8" | 9/16" | RG30516383809 |
| 7/16" | 1/4" | 1/16" | 5/8" | RG301471602 |
| 7/16" | 5/16" | 1/16" | 5/8" | RG3051671615 |
| 7/16" | 1/4" | 3/32" | 5/8" | RG061433271680 |
| 7/16" | 5/16" | 3/32" | 5/8" | RG3151671604 |
| 7/16" | 1/4" | 1/8" | 5/8" | RG31141871647 |
| 7/16" | 1/4" | 3/16" | 5/8" | RG311471627 |
| 7/16" | 1/4" | 1/4" | 5/8" | RG311471606 |
| 1/2" | 3/8" | 1/16" | 5/8" | RG30381207 |
| 1/2" | 3/8" | 1/8" | 5/8" | RG32381250 Case pricing |
| 1/2" | 1/4" | 3/16" | 5/8" | RG30141291 |
| 1/2" | 3/8" | 1/4" | 3/4" | RG3038141233 |
| 1/2" | 3/8" | 3/8" | 5/8" | RG32381209 |
| 9/16" | 5/16" | 1/16" | 13/16" | RG3051691665 |
| 9/16" | 5/16" | 1/8" | 13/16" | RG315161891648 |
| 9/16" | 5/16" | 3/16" | 13/16" | RG3151631691628 |
| 9/16" | 3/8" | 3/16" | 13/16" | RG303891635 |
| 9/16" | 5/16" | 1/4" | 13/16" | RG3151691608 |
| 5/8" | 3/8" | 1/16" | 7/8" | RG30385876_S |
| 5/8" | 1/2" | 1/16" | 13/16" | RG32125853 |
| 5/8" | — | 1/16" | — | CLSDRG3811658 (blank / closed) |
| 5/8" | 3/8" | 1/8" | 7/8" | RG31385850 |
| 5/8" | 3/16" | 1/8" | 7/8" | RG313165869 |
| 5/8" | 3/8" | 3/16" | 7/8" | RG31383165830 |
| 5/8" | 3/8" | 1/4" | 7/8" | RG31385810 |
| 3/4" | 5/16" | 1/16" | 1" | RG305163475 |
| 3/4" | 1/2" | 1/16" | 7/8" | RG32123414 |
| 3/4" | 3/8" | 1/16" | 1" | RG32383403 |
| 3/4" | 1/2" | 3/32" | 7/8" | RG30123413 |
| 3/4" | 1/2" | 1/8" | 1" | RG30123425 |
| 3/4" | 1/2" | 1/8" | 1" | RG30123425PNBX |
| 3/4" | 5/16" | 1/8" | 1" | RG28516183457 |
| 3/4" | 1/2" | 3/8" | 1" | RG30123432 |
| 13/16" | — | 1/16" | — | CLSDRG121161316 (blank / closed) |
| 13/16" | 9/16" | 1/4" | 1-1/16" | RG31916131613 |
| 7/8" | 5/8" | 1/16" | 1-1/8" | RG30587880 |
| 7/8" | 3/4" | 1/16" | 1-1/8" | RG34347877 |
| 7/8" | 5/8" | 1/8" | 1-1/8" | RG3158187855 |
| 7/8" | 3/4" | 1/8" | 1-1/16" | RG95347858 |
| 7/8" | 9/16" | 3/16" | 1-1/16" | RG319167800 |
| 7/8" | 5/8" | 3/16" | 1-1/8" | RG31587835 |
| 7/8" | 3/4" | 3/16" | — | RG32343167865 |
| 7/8" | 5/8" | 1/4" | 1-1/8" | RG31587814 |
| 7/8" | 9/16" | 3/8" | 1-1/16" | RG319167801 |
| 15/16" | — | 1/16" | — | CLSDRG341161516 (blank / closed) |
| 1" | 1/4" | 1/16" | 1-1/4" | RG3014185 |
| 1" | 3/4" | 1/16" | 1-1/4" | RG3434176_S |
| 1" | 3/4" | 1/8" | 1-1/4" | RG3434154 Case pricing |
| 1" | 3/8" | 1/8" | 1-1/4" | RG3338146 |
| 1" | 3/4" | 3/16" | 1-1/4" | RG3134181 |
| 1" | 11/16" | 3/16" | 1-5/16" | RG311111614136 |
| 1" | 7/8" | 1/4" | 1-1/4" | RG3378190 |
| 1" | 11/16" | 1/4" | 1-5/16" | RG31111614115 |
| 1-1/16" | 3/4" | 1/16" | 1-3/8" | RG3034111631 Case pricing |
| 1-1/16" | 3/4" | 1/8" | 1-3/8" | RG31341811657 |
| 1-1/16" | 3/4" | 3/16" | 1-3/8" | RG3134111637 |
| 1-1/8" | 3/4" | 3/8" | 1-5/8" | RG333411896 |
| 1-1/4" | 1" | 1/16" | 1-9/16" | RG33111451_S Case pricing |
| 1-1/4" | 3/4" | 1/16" | 1-5/8" | RG303411469 |
| 1-1/4" | 7/8" | 1/16" | 1-5/8" | RG307811611471 |
| 1-1/4" | 7/8" | 1/8" | 1-5/8" | RG317811460 |
| 1-1/4" | 3/4" | 1/8" | 1-5/8" | RG313411458 |
| 1-1/4" | 1" | 3/16" | 1-1/2" | RG32111471 |
| 1-1/4" | 7/8" | 3/16" | 1-5/8" | RG317811438 |
| 1-1/4" | 1" | 1/4" | 1-1/2" | RG30111462 |
| 1-1/4" | 3/4" | 1/4" | 1-5/8" | RG313411417 |
| 1-1/4" | 7/8" | 1/4" | 1-5/8" | RG317811418 |
| 1-1/4" | 7/8" | 3/8" | 1-3/4" | RG347811432 |
| 1-1/4" | 1" | 3/8" | 1-1/2" | RG32111448 |
| 1-1/4" | 1" | 1/2" | 1-1/2" | RG3311211428 |
| 1-3/8" | 1-1/8" | 3/16" | 1-7/8" | RG3211813870_S |
| 1-3/8" | 1" | 3/16" | 1-3/4" | RG31113839 |
| 1-3/8" | 1" | 1/4" | 1-3/4" | RG3111413819 |
| 1-1/2" | 1-1/4" | 1/16" | 1-7/8" | RG3311411221_S |
| 1-1/2" | — | 1/16" | — | CLSDRG118116112 (blank / closed) |
| 1-1/2" | 1-1/4" | 1/8" | 1-7/8" | RG3311411204 |
| 1-1/2" | 1-1/4" | 3/16" | 2" | RG3411411286 |
| 1-1/2" | 1-1/4" | 1/4" | 2" | RG3211411262_S |
| 1-5/8" | 1-5/16" | 1/16" | 2" | RG31151615843 |
| 1-5/8" | 1-5/16" | 1/8" | 2" | RG31151615842 Case pricing |
| 1-5/8" | 1-1/4" | 3/16" | 1-7/8" | RG3211418566 |
| 1-3/4" | 1-1/2" | 1/16" | 2-1/8" | RG3011213473 |
| 1-3/4" | 1-1/2" | 1/8" | 2-1/8" | RG3111213463 |
| 1-3/4" | 1-1/2" | 3/16" | 2-1/8" | RG3111213441 |
| 1-3/4" | 1-1/2" | 1/4" | 2" | RG3011213461 |
| 1-3/4" | 1-1/2" | 1/4" | 2-1/8" | RG3111213421 |
| 1-3/4" | 1-1/2" | 3/8" | 2-1/8" | RG3211213495 |
| 2" | 1-5/8" | 1/16" | 2-1/4" | RG33158116277 |
| 2" | 1-3/4" | 1/16" | 2-5/16" | RG35134116209 |
| 2" | 1-3/4" | 1/8" | 2-3/8" | RG33134285 |
| 2" | 1-5/8" | 3/16" | 2-1/4" | RG32158239 |
| 2" | 1-3/4" | 1/4" | 2-1/2" | RG32134296_S |
| 2" | 1-3/4" | 3/8" | 2-1/2" | RG34134255_S |
| 2" | 1-3/4" | 1/2" | 2-13/32" | RG3213422133241 |
| 2-1/4" | 2" | 1/8" | 2-5/8" | RG33221411 |
| 2-1/4" | 2" | 1/4" | 2-7/8" | RG34221425 |
| 2-3/8" | 2" | 3/16" | 2-3/4" | RG32223888_S |
| 2-7/16" | 1-15/16" | 1/8" | 2-3/4" | RG3311516271639 |
| 2-1/2" | 2-1/8" | 1/8" | 2-7/8" | RG3121821244 |
| 2-1/2" | 2" | 1/4" | 3" | RG33221218 |
| 2-1/2" | 2-1/4" | 1/4" | 3" | RG3421421204 |
| 2-1/2" | 2-1/4" | 3/8" | 3" | RG3421421206 |
| 2-3/4" | 2-1/2" | 1/16" | 3" | RG3321223480 |
| 2-3/4" | 2-3/8" | 1/8" | 3-3/8" | RG3323823470 |
| 2-3/4" | 2-1/2" | 1/8" | 3-1/8" | RG3321223445 |
| 2-3/4" | 2-1/2" | 1/4" | 3-1/8" | RG3221223486 |
| 2-7/8" | 2-3/8" | 1/16" | 3-3/8" | RG3223827845 Case pricing |
| 3" | 2-3/4" | 5/64" | 3-5/8" | RG33234327 Case pricing |
| 3" | 2-1/2" | 1/8" | 3-1/2" | RGZ212183343 |
| 3" | 2-1/2" | 1/4" | 3-1/2" | RG34212381 |
| 3-1/4" | 3" | 1/8" | 3-5/8" | RG33331447 |
| 3-1/2" | 3" | 3/16" | 4" | RG34331215 |
| 3-1/2" | 3" | 1/4" | 4" | RG33331219 |
| 3-3/4" | 3-1/2" | 1/8" | 4-3/4" | RG3431233464 Case pricing |
| 4" | 3-1/2" | 3/16" | 4-3/4" | RG35312401 |
| 4-3/16" | 4" | 7/8" | 5-3/4" | RG324431685 |
How to read it: the hole you drill or punch equals the grommet's groove diameter ("fits hole"). The groove width is the thickest panel the grommet snaps onto. Whatever passes through (wire, cable, hose) must be smaller than the inside diameter (ID). The outside diameter (OD) is always bigger than the hole.
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