{"title":"3\/8\" Inside Diameter (ID) Rubber Grommets","description":"\u003cp\u003eEvery grommet on this page has a 3\/8\" inside diameter (ID), the clear opening left for whatever passes through it. A 3\/8\" opening fits a single lamp or speaker cord, a 1\/4\" tube, or a sensor lead. The 11 styles here fit panel holes of 1\/2\", 9\/16\", 5\/8\", 3\/4\" or 1\", with groove widths of 1\/16\", 1\/8\", 3\/16\", 1\/4\" and 3\/8\", so you can match both the hole you drilled and the thickness of the material.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow to size a 3\/8\" ID grommet.\u003c\/strong\u003e Start with the item going through: measure its outside diameter, or the widest point of any plug or fitting that has to pass, and make sure it clears 3\/8\". Next, measure the hole with calipers; the grommet should be listed as fitting that exact hole size, because the groove has to sit tight against the edge. Last, measure the panel thickness and choose a groove width equal to it or slightly wider. If the panel is thicker than the widest groove listed, drill to a larger hole size instead and step up in ID. Searching by hole size rather than opening? Use the \"fits holes\" link below.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eRelated sizes:\u003c\/strong\u003e \u003ca href=\"\/collections\/1-2-inside-diameter-rubber-grommets\"\u003e1\/2\" ID grommets\u003c\/a\u003e · \u003ca href=\"\/collections\/3-8-groove-diameter-rubber-grommets-fits-3-8-holes\"\u003eGrommets that fit 3\/8\" holes\u003c\/a\u003e · \u003ca href=\"\/collections\/rubber-grommets\"\u003eAll rubber grommets\u003c\/a\u003e\u003c\/p\u003e","products":[{"product_id":"3-8-inside-diameter-rubber-grommet-1-8-groove-width-fits-1-2-hole","title":"3\/8\" Inside Diameter Rubber Grommet - 1\/8\" Groove Width - Fits 1\/2\" Hole","description":"\u003ch2\u003eProduct Overview:\u003c\/h2\u003e\n\u003cp\u003e3\/8\" Inside Diameter Rubber Grommet - Fits 1\/2\" Panel Holes.  Ideal for passing wires through panels without risking damage or abrasion by acting as a protective barrier, extending the lifespan of your cables and wires.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInside Diameter: 3\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Width: 1\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Diameter: 1\/2\"\u003c\/li\u003e\n\u003cli\u003eOutside Diameter: 5\/8\"\u003c\/li\u003e\n\u003cli\u003eThickness: 5\/16\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rubberfeetwarehouse","offers":[{"title":"Default Title","offer_id":42105572366,"sku":"RG32381250","price":0.41,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/8741\/products\/Picsart_23-01-24_10-38-25-668.jpg?v=1738362048"},{"product_id":"3-8-inside-diameter-rubber-grommet-1-4-groove-width-fits-5-8-holes","title":"3\/8\" Inside Diameter Rubber Grommet - 1\/4\" Groove Width - Fits 5\/8\" Holes","description":"\u003ch2\u003eProduct Overview:\u003c\/h2\u003e\n\u003cp\u003e3\/8\" Inside Diameter Rubber Grommet - 1\/4\" Groove Width - Fits 5\/8\" Holes. Ideal for passing wires through panels without risking damage or abrasion by acting as a protective barrier, extending the lifespan of your cables and wires.\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInside Diameter: 3\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Width: 1\/4\"\u003c\/li\u003e\n\u003cli\u003eGroove Diameter: 5\/8\"\u003c\/li\u003e\n\u003cli\u003eOutside Diameter: 7\/8\"\u003c\/li\u003e\n\u003cli\u003eThickness: 1\/2\"\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rubberfeetwarehouse","offers":[{"title":"Default Title","offer_id":1860435705880,"sku":"RG31385810","price":0.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/8741\/products\/Rubber_Grommet_3.jpg?v=1738362023"},{"product_id":"3-8-inside-diameter-rubber-grommet-1-8-groove-width-fits-1-holes","title":"3\/8\" Inside Diameter Rubber Grommet - 1\/8\" Groove Width - Fits 1\" Holes","description":"\u003ch2\u003eProduct Overview:\u003c\/h2\u003e\n\u003cp\u003e3\/8\" Inside Diameter Rubber Grommet - 1\/8\" Groove Width - Fits 1\" Holes.\u003c\/p\u003e\n\u003cp\u003eIdeal for passing wires through panels without risking damage or abrasion by acting as a protective barrier, extending the lifespan of your cables and wires.\u003cbr\u003e\u003c\/p\u003e\n\u003ch2\u003e\u003cbr\u003e\u003c\/h2\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInside Diameter: 3\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Width: 1\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Diameter: 1\"\u003c\/li\u003e\n\u003cli\u003eOutside Diameter: 1-1\/4\"\u003c\/li\u003e\n\u003cli\u003eThickness: 5\/16\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rubberfeetwarehouse","offers":[{"title":"Default Title","offer_id":2704348971032,"sku":"RG3338146","price":1.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/8741\/products\/grommet46_again.jpg?v=1738362011"},{"product_id":"3-8-inside-diameter-rubber-grommet-1-16-groove-width-fits-1-2-holes","title":"3\/8\" Inside Diameter Rubber Grommet - 1\/16\" Groove Width - Fits 1\/2\" Holes","description":"\u003ch2\u003eProduct Overview:\u003c\/h2\u003e\n\u003cp\u003e3\/8\" Inside Diameter Rubber Grommet - 1\/16\" Groove Width - Fits 1\/2\" Holes. Ideal for passing wires through panels without risking damage or abrasion by acting as a protective barrier, extending the lifespan of your cables and wires. Can be used to seal holes and many other uses.\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInside Diameter: 3\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Width: 1\/16\"\u003c\/li\u003e\n\u003cli\u003eGroove Diameter: 1\/2\"\u003c\/li\u003e\n\u003cli\u003eOutside Diameter: 5\/8\"\u003c\/li\u003e\n\u003cli\u003eThickness: 1\/4\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rubberfeetwarehouse","offers":[{"title":"Default Title","offer_id":2776283480088,"sku":"RG30381207","price":0.18,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/8741\/products\/grommet_i_erased.jpg?v=1738362009"},{"product_id":"3-8-inside-diameter-rubber-grommet-1-8-groove-width-fits-5-8-holes","title":"3\/8\" Inside Diameter Rubber Grommet - 1\/8\" Groove Width - Fits 5\/8\" Holes","description":"\u003ch2\u003eProduct Overview:\u003c\/h2\u003e\n\u003cp\u003e3\/8\" Inside Diameter Rubber Grommet - 1\/8\" Groove Width - Fits 5\/8\" Holes. Ideal for passing wires through panels without risking damage or abrasion by acting as a protective barrier, extending the lifespan of your cables and wires.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInside Diameter: 3\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Width: 1\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Diameter: 5\/8\"\u003c\/li\u003e\n\u003cli\u003eOutside Diameter: 7\/8\"\u003c\/li\u003e\n\u003cli\u003eThickness: 3\/8\"\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rubberfeetwarehouse","offers":[{"title":"Default Title","offer_id":3205595856920,"sku":"RG31385850","price":0.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/8741\/products\/mo_grommet.jpg?v=1738362008"},{"product_id":"3-8-inside-diameter-rubber-grommet-1-16-gw-fits-5-8-holes","title":"3\/8\" Inside Diameter Rubber Grommet - 1\/16\" Groove Width - Fits  5\/8\" Holes","description":"\u003ch2\u003eProduct Overview:\u003c\/h2\u003e\n\u003cp\u003e3\/8\" Inside Diameter Rubber Grommet - 1\/16\" Groove Width - Fits 5\/8\" Holes. Ideal for passing wires through panels without risking damage or abrasion by acting as a protective barrier, extending the lifespan of your cables and wires.\u003c\/p\u003e\n\u003ch3\u003eDimensions:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInside Diameter: 3\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Width: 1\/16\"\u003c\/li\u003e\n\u003cli\u003eGroove Diameter: 5\/8\"\u003c\/li\u003e\n\u003cli\u003eOutside Diameter: 7\/8\"\u003c\/li\u003e\n\u003cli\u003eThickness: 5\/16\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rubberfeetwarehouse","offers":[{"title":"Default Title","offer_id":13086521720941,"sku":"RG30385876_S","price":0.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/8741\/products\/76_grom_2.jpg?v=1738362002"},{"product_id":"3-8-inside-diameter-rubber-grommet-1-16-groove-width-fits-3-4-hole","title":"3\/8\" Inside Diameter Rubber Grommet - 1\/16\" Groove Width - Fits 3\/4\" Hole","description":"\u003ch2\u003eProduct Overview:\u003c\/h2\u003e\n\u003cp\u003e3\/8\" Inside Diameter Rubber Grommet - 1\/16\" Groove Width - Fits 3\/4\" Holes. Ideal for passing wires through panels without risking damage or abrasion by acting as a protective barrier, extending the lifespan of your cables and wires.\u003c\/p\u003e\n\u003ch3\u003e\u003cspan size='style=\"font-family:'\u003e\u003cspan size='style=\"font-family:'\u003e\u003cspan size='style=\"font-family:'\u003e\u003cspan style=\"font-family: Arial; font-size: large;\" size=\"\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\" size=\"\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\" size=\"\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\" size=\"\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\" size=\"\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\" size=\"\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\" size=\"\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\" size=\"\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\" size=\"\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\" size=\"\"\u003e\u003cspan style=\"font-family: Arial; font-size: large;\" size=\"\"\u003e\u003cbr\u003e\u003cstrong\u003eProduct Specifications:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInside Diameter: 3\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Width: 1\/16\"\u003c\/li\u003e\n\u003cli\u003eGroove Diameter: 3\/4\"\u003c\/li\u003e\n\u003cli\u003eOutside Diameter: 1\"\u003c\/li\u003e\n\u003cli\u003eThickness: 3\/8\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rubberfeetwarehouse","offers":[{"title":"Default Title","offer_id":15058045042797,"sku":"RG32383403","price":0.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/8741\/products\/57_82832c16-df55-4cd0-a46b-20f1c9a6b690.jpg?v=1738361976"},{"product_id":"3-8-inside-diameter-rubber-grommet-1-4-groove-width-fits-1-2-holes","title":"3\/8\" Inside Diameter Rubber Grommet - 1\/4\" Groove Width - Fits 1\/2\" Holes","description":"\u003ch2\u003eProduct Overview:\u003c\/h2\u003e\n\u003cp\u003e3\/8\" Inside Diameter Rubber Grommet - 1\/4\" Groove Width - Fits 1\/2\" Holes. Ideal for passing wires through panels without risking damage or abrasion by acting as a protective barrier, extending the lifespan of your cables and wires.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInside Diameter: 3\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Width: 1\/4\"\u003c\/li\u003e\n\u003cli\u003eGroove Diameter: 1\/2\"\u003c\/li\u003e\n\u003cli\u003eOutside Diameter: 3\/4\"\u003c\/li\u003e\n\u003cli\u003eThickness: 1\/2\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rubberfeetwarehouse","offers":[{"title":"Default Title","offer_id":32728489001069,"sku":"RG3038141233","price":0.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/8741\/products\/1grommetnewshopify_2.jpg?v=1738361958"},{"product_id":"50-rubber-grommets-3-8-inside-diameter-3-16-groove-fits-5-8-panel-holes","title":"3\/8\" Inside Diameter Rubber Grommet - 3\/16\" Groove - Fits 5\/8\" Panel Holes","description":"\u003ch2\u003eProduct Overview:\u003c\/h2\u003e\n\u003cp\u003e3\/8\" Inside Diameter Rubber Grommet - 3\/16\" Groove - Fits 5\/8\" Panel Holes\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDimensions:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInside Diameter: 3\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Width: 3\/16\"\u003c\/li\u003e\n\u003cli\u003eGroove Diameter: 5\/8\"\u003c\/li\u003e\n\u003cli\u003eOutside Diameter: 7\/8\"\u003c\/li\u003e\n\u003cli\u003eThickness: 7\/16\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rubberfeetwarehouse","offers":[{"title":"Default Title","offer_id":32945495048301,"sku":"RG31383165830","price":0.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/8741\/files\/Picsart_23-05-11_13-07-03-302.jpg?v=1738361952"},{"product_id":"3-8-inside-diameter-rubber-grommet-3-16-groove-width-fits-9-16-holes","title":"3\/8\" Inside Diameter Rubber Grommet - 3\/16\" Groove Width - Fits 9\/16\" Holes","description":"\u003ch2\u003eProduct Overview:\u003c\/h2\u003e\n\u003cp\u003e3\/8\" Inside Diameter Rubber Grommet - 3\/16\" Groove Width - Fits 9\/16\" Holes. Ideal for passing wires through panels without risking damage or abrasion by acting as a protective barrier, extending the lifespan of your cables and wires.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eProduct Specifications:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eInside Diameter: 3\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Width: 3\/16\"\u003c\/li\u003e\n\u003cli\u003eGroove Diameter: 9\/16\"\u003c\/li\u003e\n\u003cli\u003eOutside Diameter: 13\/16\"\u003c\/li\u003e\n\u003cli\u003eThickness: 3\/8\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rubberfeetwarehouse","offers":[{"title":"Default Title","offer_id":40536664604781,"sku":"RG303891635","price":0.41,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/8741\/products\/Picsart_23-02-06_22-22-11-206.jpg?v=1738361931"},{"product_id":"3-8-inside-diameter-rubber-grommet-3-8-groove-width-fits-1-2-hole","title":"3\/8\" Inside Diameter Rubber Grommet - 3\/8\" Groove Width - Fits 1\/2\" Hole","description":"\u003ch2\u003eProduct Overview:\u003c\/h2\u003e\n\u003cp\u003e3\/8\" Inside Diameter Rubber Grommet - 3\/8\" Groove Width - Fits 1\/2\" Panel Holes.  Ideal for passing wires through panels without risking damage or abrasion by acting as a protective barrier, extending the lifespan of your cables and wires.\u003cbr\u003e\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eProduct Specifications:\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInside Diameter: 3\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Width: 3\/8\"\u003c\/li\u003e\n\u003cli\u003eGroove Diameter: 1\/2\"\u003c\/li\u003e\n\u003cli\u003eOutside Diameter: 5\/8\"\u003c\/li\u003e\n\u003cli\u003eThickness: 5\/8\"\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Rubberfeetwarehouse","offers":[{"title":"Default Title","offer_id":42078553636973,"sku":"RG32381209","price":0.55,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/8741\/files\/RG32381209_Rubber_Grommet.jpg?v=1741294720"}],"url":"https:\/\/www.rubberfeetwarehouse.com\/collections\/3-8-inside-diameter-rubber-grommets.oembed","provider":"Rubberfeetwarehouse","version":"1.0","type":"link"}