Rubber grommets: panel hole, panel thickness, ID, head diameter, height (Heyco inch, Essentra metric) + hole gauges — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/rubber-grommets-panel-hole/ (sheet CC BY 4.0) Basis: Heyco's three rubber-grommet tables (.063, .125-.188 and .250-.375 in panels), cross-checked against a distributor copy and a McMaster-Carr row, and four Essentra metric part pages. Files: three hole gauges with the published mounting-hole diameters Catalog version: 2026-10-20 Overall (mm): length 572.6, width 79.5, height 3.0 - A rubber grommet is a bushing with a groove that seats in a round panel hole; the panel thickness it is made for is the groove width. Columns follow Heyco: panel thickness, mounting hole, ID (A, where the cable passes), head diameter (B, the flange) and overall height (C), each in inches / millimetres as printed. Heyco's standard colour is black and its thick-panel page says grommets are SBR unless noted (some parts are nitrile, neoprene, EPDM or PVC; the material column is not repeated here, so look it up by part number). - Panels up to .063 in (1.6 mm) are one Heyco page; .125 / .156 / .188 in panels are a second page that was cross-checked against a distributor's copy of the same table; .250 and .375 in panels are a third page. The distributor copy printed some cells shifted by a row, so for the second page only cells where both copies print the same figure are shown (a '—' means the copies disagree or one is blank), and 0 row(s) whose ID differed between the copies were dropped (none). The first and third pages have one source each; one row was checked against McMaster-Carr: a 9/16 in hole in a 1/16 in panel with a 7/16 in ID and 3/4 in flange, 1/4 in high, matches Heyco G1123 (.44 ID, .75 head, .25 high). - Left off the table: Heyco G1279 (made for a .257 in panel), the head and height cells that are blank on the Heyco page, and any part number outside these three tables. Hole size is the panel hole, not the grommet's OD: the groove of the grommet is a little larger than the cable and fits the hole, and the groove diameter is not printed on any page read. - Metric: Essentra prints hole diameter, panel thickness, inside diameter, overall diameter (which it does not call the flange) and overall height for each item: 498062 is 5.0 hole / 1.0 panel / 2.0 ID / 8.0 / 4.0; 498088 is 11.0 / 1.0 / 8.0 / 16.0 / 6.0; 498094 is 12.0 / 3.0 / 8.0 / 16.0 / 8.0; 498108 is 18.0 / 2.0 / 12.0 / 22.0 / 7.0. These four are the items read, not the catalogue. The Essentra 'guide' page has no table. A separate datasheet for item 498071 reads 8 mm hole and 2 mm maximum panel but prints no ID or height, so it is not used. Metric and inch parts overlap in size but are not interchangeable. - The gauges are plates with true-size holes at the published mounting-hole diameters (inch ×25.4); fit your panel hole to them before ordering. Plate size, 3 mm thickness, 8 mm spacing and 3 mm corner radius are Xem choices. McMaster-Carr sells many sizes with per-part STEP; this page links its 9/16 in grommet category and does not copy its files. part no. panel thickness (in / mm) mounting hole (in / mm) ID (in / mm) head diameter (in / mm) height (in / mm) G1004 0.063 / 1.6 .250 / 6.4 .13 / 3.2 .34 / 8.7 .19 / 4.8 G1005 0.063 / 1.6 .250 / 6.4 .16 / 4.0 .38 / 9.5 — G1006 0.063 / 1.6 .250 / 6.4 .16 / 4.0 .44 / 11.1 .38 / 9.5 G1017 0.063 / 1.6 .312 / 7.9 .19 / 4.8 .42 / 10.3 .22 / 5.6 G1018 0.063 / 1.6 .312 / 7.9 .19 / 4.8 .44 / 11.1 .19 / 4.8 G1019 0.063 / 1.6 .312 / 7.9 .19 / 4.8 .50 / 12.7 .25 / 6.4 G1026 0.063 / 1.6 .312 / 7.9 .22 / 5.6 .44 / 11.1 .19 / 4.8 G1037 0.063 / 1.6 .375 / 9.5 .25 / 6.4 .56 / 14.3 .25 / 6.4 G1052 0.063 / 1.6 .437 / 11.1 .25 / 6.4 .63 / 15.9 .19 / 4.8 G1053 0.063 / 1.6 .437 / 11.1 .25 / 6.4 .63 / 15.9 .31 / 8.0 G1061 0.063 / 1.6 .437 / 11.1 .31 / 8.0 .63 / 15.9 .28 / 7.1 G1089 0.063 / 1.6 .500 / 12.7 .38 / 9.5 .63 / 15.9 .25 / 6.4 G1090 0.063 / 1.6 .500 / 12.7 .38 / 9.5 .69 / 17.5 .28 / 7.1 G1112 0.063 / 1.6 .562 / 14.3 .31 / 8.0 .81 / 20.7 .31 / 8.0 G1123 0.063 / 1.6 .562 / 14.3 .44 / 11.1 .75 / 19.1 .25 / 6.4 G1130 0.063 / 1.6 .625 / 15.9 .38 / 9.5 .88 / 22.2 .31 / 8.0 G1137 0.063 / 1.6 .625 / 15.9 .50 / 12.7 .81 / 20.7 .28 / 7.1 G1150 0.063 / 1.6 .687 / 17.5 .44 / 11.1 .94 / 23.8 .31 / 8.0 G1155 0.063 / 1.6 .687 / 17.5 .50 / 12.7 .88 / 22.2 .25 / 6.4 G1174 0.063 / 1.6 .750 / 19.1 .38 / 9.5 1.00 / 25.4 .38 / 9.5 G1176 0.063 / 1.6 .750 / 19.1 .50 / 12.7 .88 / 22.2 .25 / 6.4 G1192 0.063 / 1.6 .812 / 20.6 .50 / 12.7 1.06 / 27.0 .31 / 8.0 G1208 0.063 / 1.6 .875 / 22.2 .31 / 8.0 1.38 / 34.9 .25 / 6.4 G1215 0.063 / 1.6 .875 / 22.2 .63 / 15.9 1.13 / 28.6 .31 / 8.0 G1242 0.063 / 1.6 1.000 / 25.4 .38 / 9.5 1.25 / 31.8 .25 / 6.4 G1252 0.063 / 1.6 1.000 / 25.4 .69 / 17.5 1.31 / 33.4 .38 / 9.5 G1258 0.063 / 1.6 1.000 / 25.4 .75 / 19.1 1.25 / 31.8 .30 / 7.5 G1269 0.063 / 1.6 1.062 / 27.0 .75 / 19.1 1.38 / 34.9 .38 / 9.5 G1290 0.063 / 1.6 1.250 / 31.8 .50 / 12.7 1.50 / 38.1 .25 / 6.4 G1303 0.063 / 1.6 1.250 / 31.8 .88 / 22.2 1.63 / 41.3 .44 / 11.1 G1311 0.063 / 1.6 1.250 / 31.8 1.00 / 25.4 1.56 / 39.7 .31 / 8.0 G1320 0.063 / 1.6 1.375 / 34.9 1.00 / 25.4 1.75 / 44.5 .44 / 11.1 G1347 0.063 / 1.6 1.500 / 38.1 1.13 / 28.6 1.88 / 47.6 .38 / 9.5 G1349 0.063 / 1.6 1.500 / 38.1 1.25 / 31.8 1.88 / 47.6 .34 / 8.7 G1322 .125 / 3.2 1.375 / 34.9 1.00 / 25.4 1.75 / 44.5 .50 / 12.7 G1350 .125 / 3.2 1.500 / 38.1 1.25 / 31.8 1.88 / 47.6 .41 / 10.3 G1363 .125 / 3.2 1.625 / 41.3 1.31 / 33.4 2.00 / 50.8 .44 / 11.1 G1364 .125 / 3.2 1.625 / 41.3 1.38 / 34.9 1.88 / 47.6 .41 / 10.3 G1371 .125 / 3.2 1.750 / 44.5 1.50 / 38.1 2.13 / 54.0 .50 / 12.7 G1392 .125 / 3.2 2.000 / 50.8 1.75 / 44.5 2.38 / 60.3 .38 / 9.5 G1423 .125 / 3.2 2.500 / 63.5 2.13 / 54.0 2.88 / 73.0 .44 / 11.1 G1094 .156 / 4.0 .500 / 12.7 .38 / 9.5 .69 / 17.5 .31 / 8.0 G1181 .156 / 4.0 .750 / 19.1 .50 / 12.7 .94 / 23.8 — G1348 .156 / 4.0 1.500 / 38.1 1.19 / 30.2 1.75 / 44.5 — G1022 .188 / 4.8 .312 / 7.9 .19 / 4.8 .44 / 11.8 .31 / 8.0 G1034 .188 / 4.8 .375 / 9.5 .19 / 4.8 .63 / 15.9 .38 / 9.5 G1057 .188 / 4.8 .437 / 11.1 .25 / 6.4 .63 / 15.9 .31 / 8.0 G1110 .188 / 4.8 .562 / 14.3 .19 / 4.8 .75 / 19.1 .31 / 8.0 G1115 .188 / 4.8 .562 / 14.3 .31 / 8.0 .81 / 20.7 .38 / 9.5 G1116 .188 / 4.8 .562 / 14.3 .31 / 8.0 .81 / 20.7 .44 / 11.1 G1120 .188 / 4.8 .562 / 14.3 .38 / 9.5 .81 / 20.7 .38 / 9.5 G1133 .188 / 4.8 .625 / 15.9 .38 / 9.5 .88 / 22.2 — G1135 .188 / 4.8 .625 / 15.9 .40 / 10.2 1.10 / 27.9 — G1153 .188 / 4.8 .687 / 17.5 .44 / 11.1 .94 / 23.8 — G1172 .188 / 4.8 .750 / 19.1 .31 / 8.0 1.00 / 25.4 — G1194 .188 / 4.8 .812 / 20.6 .50 / 12.7 — — G1199 .188 / 4.8 .812 / 20.6 .56 / 14.3 — — G1213 .188 / 4.8 .875 / 22.2 .56 / 14.3 1.06 / 27.0 — G1219 .188 / 4.8 .875 / 22.2 .63 / 15.9 1.13 / 28.6 — G1256 .188 / 4.8 1.000 / 25.4 .69 / 17.5 1.31 / 33.4 .50 / 12.7 G1261 .188 / 4.8 1.000 / 25.4 .75 / 19.1 1.25 / 31.8 .56 / 14.3 G1272 .188 / 4.8 1.062 / 27.0 .75 / 19.1 1.38 / 34.9 .50 / 12.7 G1306 .188 / 4.8 1.250 / 31.8 .88 / 22.2 1.63 / 41.3 .56 / 14.3 G1312 .188 / 4.8 1.250 / 31.8 1.00 / 25.4 1.50 / 38.1 .44 / 11.1 G1323 .188 / 4.8 1.375 / 34.9 1.00 / 25.4 1.75 / 44.5 .56 / 14.3 G1329 .188 / 4.8 1.375 / 34.9 1.13 / 28.6 1.88 / 47.6 .50 / 12.7 G1351 .188 / 4.8 1.500 / 38.1 1.25 / 31.8 2.00 / 50.8 .63 / 15.9 G1372 .188 / 4.8 1.750 / 44.5 1.50 / 38.1 2.13 / 54.0 .56 / 14.3 G1390 .188 / 4.8 2.000 / 50.8 1.63 / 41.3 2.25 / 57.2 .75 / 19.1 G1404 .188 / 4.8 2.200 / 55.9 2.00 / 50.8 2.75 / 69.9 .56 / 14.2 G1414 .188 / 4.8 2.375 / 60.3 2.00 / 50.8 2.75 / 69.9 — G1023 .250 / 6.4 .312 / 7.9 .19 / 4.8 .44 / 11.1 .38 / 9.5 G1058 .250 / 6.4 .437 / 11.1 .25 / 6.4 .63 / 15.9 — G1086 .250 / 6.4 .500 / 12.7 .31 / 8.0 .63 / 15.9 .63 / 15.9 G1095 .250 / 6.4 .500 / 12.7 .38 / 9.5 .75 / 19.1 .50 / 12.7 G1117 .250 / 6.4 .562 / 14.3 .31 / 8.0 .81 / 20.6 .50 / 12.7 G1134 .250 / 6.4 .625 / 15.9 .38 / 9.5 .88 / 22.2 — G1154 .250 / 6.4 .687 / 17.5 .44 / 11.1 .94 / 23.8 — G1195 .250 / 6.4 .812 / 20.6 .50 / 12.7 1.06 / 27.0 — G1220 .250 / 6.4 .875 / 22.2 .63 / 15.9 1.13 / 28.6 — G1257 .250 / 6.4 1.000 / 25.4 .69 / 17.5 1.31 / 33.3 .56 / 14.3 G1264 .250 / 6.4 1.000 / 25.4 .88 / 22.2 1.25 / 31.8 .63 / 15.9 G1273 .250 / 6.4 1.062 / 27.0 .75 / 19.1 1.38 / 34.9 .56 / 14.3 G1301 .250 / 6.4 1.250 / 31.8 .75 / 19.1 1.63 / 41.3 .44 / 11.1 G1307 .250 / 6.4 1.250 / 31.8 .88 / 22.2 1.63 / 41.3 .63 / 15.9 G1324 .250 / 6.4 1.375 / 34.9 1.00 / 25.4 1.75 / 44.5 .63 / 15.9 G1353 .250 / 6.4 1.500 / 38.1 1.25 / 31.8 1.75 / 44.5 .50 / 12.7 G1354 .250 / 6.4 1.500 / 38.1 1.25 / 31.8 2.00 / 50.8 .52 / 13.1 G1373 .250 / 6.4 1.750 / 44.5 1.50 / 38.1 2.00 / 50.8 .50 / 12.7 G1374 .250 / 6.4 1.750 / 44.5 1.50 / 38.1 2.13 / 54.0 .63 / 15.9 G1393 .250 / 6.4 2.000 / 50.8 1.75 / 44.5 2.50 / 63.5 .53 / 13.5 G1394 .250 / 6.4 2.000 / 50.8 1.75 / 44.5 2.50 / 63.5 .56 / 14.2 G1421 .250 / 6.4 2.500 / 63.5 2.00 / 50.8 3.00 / 76.2 .56 / 14.3 G1425 .250 / 6.4 2.500 / 63.5 2.25 / 57.2 3.00 / 76.2 .63 / 15.9 G1043 .375 / 9.5 .375 / 9.5 .31 / 8.0 .56 / 14.3 .50 / 12.7 G1096 .375 / 9.5 .500 / 12.7 .38 / 9.5 .63 / 15.9 .63 / 15.9 G1121 .375 / 9.5 .562 / 14.3 .38 / 9.5 .75 / 19.1 .75 / 19.1 G1136 .375 / 9.5 .625 / 15.9 .41 / 10.3 .81 / 20.6 .63 / 15.9 G1182 .375 / 9.5 .750 / 19.1 .50 / 12.7 1.00 / 25.4 — G1214 .375 / 9.5 .875 / 22.2 .56 / 14.3 1.06 / 27.0 — G1232 .375 / 9.5 .968 / 24.6 .69 / 17.4 1.31 / 33.3 — G1249 .375 / 9.5 1.000 / 25.4 .56 / 14.3 1.25 / 31.8 — G1278 .375 / 9.5 1.125 / 28.6 .75 / 19.1 1.63 / 41.3 1.13 / 28.6 G1314 .375 / 9.5 1.250 / 31.8 1.00 / 25.4 1.50 / 38.1 .63 / 15.9 G1326 .375 / 9.5 1.375 / 34.9 1.00 / 25.4 1.75 / 44.5 .75 / 19.1 G1375 .375 / 9.5 1.750 / 44.5 1.50 / 38.1 2.13 / 54.0 — G1395 .375 / 9.5 2.000 / 50.8 1.75 / 44.5 2.50 / 63.5 .63 / 15.9 G1427 .375 / 9.5 2.500 / 63.5 2.25 / 57.2 3.00 / 76.2 .75 / 19.1 Essentra 498062 (EPDM) 1.0 mm Ø5.0 mm 2.0 mm 8.0 mm 4.0 mm Essentra 498088 (EPDM) 1.0 mm Ø11.0 mm 8.0 mm 16.0 mm 6.0 mm Essentra 498094 (EPDM) 3.0 mm Ø12.0 mm 8.0 mm 16.0 mm 8.0 mm Essentra 498108 (EPDM) 2.0 mm Ø18.0 mm 12.0 mm 22.0 mm 7.0 mm Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Heyco: Rubber grommets for panels up to .063 in (1.6 mm) thick: mounting hole, ID (A), head diameter (B), height (C) — web — Maker table; numbers only — https://www.heyco.com/products/bushings-grommets-heycaps-plugs/tubing-caps-and-plugs/heyco-rubber-grommets-for-panels-up-to-063-16-mm-thick - Heyco: Rubber grommets for .125 in (3.2 mm) to .188 in (4.8 mm) panels: mounting hole, ID, head diameter, height — web — Maker table; numbers only — https://www.heyco.com/products/bushings-grommets-heycaps-plugs/tubing-caps-and-plugs/heyco-rubber-grommets-125-32-mm-to-188-48-mm-panel-thickness - Heyco: Thick panel rubber grommets, .250 in (6.4 mm) and .375 in (9.5 mm) panels: mounting hole, ID, head diameter, height — web — Maker table; numbers only — https://www.heyco.com/products/bushings-grommets-heycaps-plugs/tubing-caps-and-plugs/heyco-thick-panel-rubber-grommets - IEWC (distributor copy of the Heyco table): Heyco rubber grommets, .125 to .188 in panels (used only to check the Heyco page) — web — Distributor sheet; numbers only — https://media.iewc.com/SpecificationSheets/1115.pdf - Essentra Components: Standard open grommets 498062, 498088, 498094, 498108 (EPDM): hole diameter, panel thickness, overall diameter, inside diameter, overall height — web — Maker pages; numbers only — https://www.essentracomponents.com/en-au/p/open-grommets-quick-fit-grommets/498062 - McMaster-Carr: Grommets (9/16 in hole page) (free STEP/IGES per part, for your own design use; no redistribution) — STEP, IGES, PDF — McMaster-Carr site terms: personal design use, no redistribution [verify license at link] — https://www.mcmaster.com/products/grommets/hole-diameter~9-16/ Free files (CC BY 4.0, Xem Studio; STEP + STL, 3 parts): https://xemstudio.com/files/hardware/rubber-grommets-panel-hole/index.json API: https://xemstudio.com/api/geometry?object=rubber-grommets-panel-hole