{"product_id":"m-309-p-or-bi-std-b70","title":"AS568-309 Buna-N Nitrile (70A) O-Ring, 70A Durometer, 7\/16\" ID x 3\/16\" CS (0.412\" x 0.210\" Actual, 0.832\" OD) - Precision-Molded Replacement Sealing Ring for Pumps, Valves, Filters, Gearboxes \u0026 Hydraulics","description":"\u003cp\u003eChasing a leak or a slow drip and need the exact o-ring size to seal it for good? A worn or wrong-size o-ring lets fluid weep past the joint, drops pressure, and can damage the equipment around it.\u003c\/p\u003e\u003cbr\u003e\u003cp\u003eThis Beaver Island Parts Company replacement o-ring is a single AS568-309 o-ring, a universal industry-standard size. Its nominal size is 7\/16\" inside diameter by 3\/16\" cross-section; the actual measured dimensions are 0.412\" ID by 0.210\" CS, held to a tolerance of ±0.005\" on the ID and ±0.005\" on the CS, for a 0.832\" outer diameter. It is molded in 70A Buna-N Nitrile rubber and is a drop-in replacement for any standard dash-309 o-ring.\u003c\/p\u003e\u003cbr\u003e\u003cb\u003eFull Compatibility:\u003c\/b\u003e AS568-309 is a standard o-ring dash size used across pumps, filters, valves, gearboxes, hydraulic fittings, plumbing and countless machines. If your application calls for a 0.412\" ID x 0.210\" CS o-ring, this is the size.\u003cbr\u003e\u003cb\u003eInstallation Note:\u003c\/b\u003e Clean the groove, inspect the sealing surface, seat the new o-ring without twisting it, and lubricate before assembly. No special tools are required for most o-ring changes.\u003cbr\u003e\u003cb\u003ePro Tip:\u003c\/b\u003e Apply \u003ca href=\"https:\/\/beaverislandparts.com\/products\/aqua-flex-food-grade-silicone-lubricant-50g\" target=\"_blank\" rel=\"noopener\"\u003eAqua Flex\u003c\/a\u003e lubricant to the o-ring before installation to ease seating and extend seal life.\u003cbr\u003e\u003cp\u003eWe are an American family-owned and operated small business committed to providing high-quality replacement parts and straightforward, honest fitment information so you can fix it once and get back to work.\u003c\/p\u003e","brand":"Beaver Island Parts Company","offers":[{"title":"1 (Single)","offer_id":48610214740173,"sku":"M.309.1.OR.BI.STD.B70","price":9.99,"currency_code":"USD","in_stock":true},{"title":"5-Pack","offer_id":48610214772941,"sku":"M.309.5.OR.BI.STD.B70","price":9.99,"currency_code":"USD","in_stock":true},{"title":"10-Pack","offer_id":48610214805709,"sku":"M.309.10.OR.BI.STD.B70","price":9.99,"currency_code":"USD","in_stock":true},{"title":"25-Pack","offer_id":48610214838477,"sku":"M.309.25.OR.BI.STD.B70","price":14.99,"currency_code":"USD","in_stock":true},{"title":"50-Pack","offer_id":48610214871245,"sku":"M.309.50.OR.BI.STD.B70","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8110\/0237\/files\/2026_O-RING_BOX_309_2603101f-aa99-49d0-8db5-798f0765ba51.jpg?v=1785885406","url":"https:\/\/beaverislandparts.com\/products\/m-309-p-or-bi-std-b70","provider":"Beaver Island Parts Company","version":"1.0","type":"link"}