{"product_id":"m-0443-57-p-or-bi-bs45-v70","title":"BS 4518 0443-57 FKM Fluorocarbon Metric O-Ring, 70A Durometer, 44.3mm ID x 5.7mm CS (1.744\" x 0.224\", 55.7mm 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 BS 4518 0443-57 o-ring, a standard metric sealing size measuring 44.3mm inside diameter by 5.7mm cross-section (1.744\" ID x 0.224\" CS, 55.7mm outer diameter), molded in 70A Fluorocarbon (FKM) rubber.\u003c\/p\u003e\u003cbr\u003e\u003cb\u003eFull Compatibility:\u003c\/b\u003e BS 4518 0443-57 is an international-standard o-ring size used across pumps, valves, filters, fittings and machinery worldwide. If your application calls for a 44.3mm x 5.7mm 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":48609958789325,"sku":"M.0443-57.5.OR.BI.BS45.V70","price":18.99,"currency_code":"USD","in_stock":true},{"title":"10-Pack","offer_id":48609958822093,"sku":"M.0443-57.10.OR.BI.BS45.V70","price":27.99,"currency_code":"USD","in_stock":true},{"title":"25-Pack","offer_id":48609958854861,"sku":"M.0443-57.25.OR.BI.BS45.V70","price":59.99,"currency_code":"USD","in_stock":true},{"title":"50-Pack","offer_id":48609958887629,"sku":"M.0443-57.50.OR.BI.BS45.V70","price":98.99,"currency_code":"USD","in_stock":true},{"title":"100-Pack","offer_id":48609958920397,"sku":"M.0443-57.100.OR.BI.BS45.V70","price":164.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8110\/0237\/files\/AS568-327_59368998-ed77-495b-bb14-34f23369ab47.png?v=1785882906","url":"https:\/\/beaverislandparts.com\/products\/m-0443-57-p-or-bi-bs45-v70","provider":"Beaver Island Parts Company","version":"1.0","type":"link"}