{"product_id":"m-c0400-p-or-bi-iso-b70","title":"ISO 3601 C0400 Buna-N Nitrile (70A) Metric O-Ring, 70A Durometer, 40mm ID x 3.55mm CS (1.575\" x 0.140\", 47.1mm OD) - Precision-Molded Replacement Sealing Ring for Pumps, Valves \u0026 Fittings","description":"\u003cp\u003eChasing a leak or a slow drip and need the exact metric 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 ISO 3601 C0400 o-ring, a standard metric sealing size measuring 40mm inside diameter by 3.55mm cross-section (1.575\" ID x 0.140\" CS, 47.1mm outer diameter), molded in 70A Buna-N Nitrile rubber.\u003c\/p\u003e\u003cbr\u003e\u003cb\u003eFull Compatibility:\u003c\/b\u003e ISO 3601 C0400 is an international-standard o-ring size used across pumps, valves, filters, fittings and machinery worldwide. If your application calls for a 40mm x 3.55mm 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.\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 before installation to ease seating and extend seal life.\u003cbr\u003e\u003cp\u003eWe are an American family-owned and operated small business committed to high-quality replacement parts and honest fitment information.\u003c\/p\u003e","brand":"Beaver Island Parts Company","offers":[{"title":"5-Pack","offer_id":48609667842253,"sku":"M.C0400.5.OR.BI.ISO.B70","price":9.99,"currency_code":"USD","in_stock":true},{"title":"10-Pack","offer_id":48609667875021,"sku":"M.C0400.10.OR.BI.ISO.B70","price":12.99,"currency_code":"USD","in_stock":true},{"title":"25-Pack","offer_id":48609667907789,"sku":"M.C0400.25.OR.BI.ISO.B70","price":20.99,"currency_code":"USD","in_stock":true},{"title":"50-Pack","offer_id":48609667940557,"sku":"M.C0400.50.OR.BI.ISO.B70","price":31.99,"currency_code":"USD","in_stock":true},{"title":"100-Pack","offer_id":48609667973325,"sku":"M.C0400.100.OR.BI.ISO.B70","price":48.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8110\/0237\/files\/2026_O-RING_BOX_223_50076ed6-6952-496c-a526-b5bfa7ce59c0.jpg?v=1785879667","url":"https:\/\/beaverislandparts.com\/products\/m-c0400-p-or-bi-iso-b70","provider":"Beaver Island Parts Company","version":"1.0","type":"link"}