{"product_id":"as568-351-buna-n-nitrile-x-ring-70a-durometer","title":"AS568-351 Buna-N Nitrile X-Ring (Quad Ring), 70A Durometer, (4.725\" x 0.210\" Actual) - Low-Friction 4-Lobe Seal","description":"\u003cp\u003e\u003cstrong\u003eFINAL SALE - NO RETURNS. THIS IS A STANDARD CATALOGUE SIZE; CONFIRM YOUR DIMENSIONS AND MATERIAL BEFORE ORDERING.\u003c\/strong\u003e\u003c\/p\u003e\u003cp\u003eBecause standard sizes are chosen by measurement rather than by machine model, they ship as final sale. If we send the wrong item, or it arrives damaged or defective, we replace it free of charge, and that never changes.\u003c\/p\u003e\u003cp\u003eIs a standard o-ring rolling, twisting or wearing out too fast in a moving joint? An X-ring (also called a quad ring) has four lobes and two sealing contact lines, so it runs with less friction and resists the spiral twist that kills o-rings in reciprocating and rotary service.\u003c\/p\u003e\u003cp\u003eThis Beaver Island Parts Company x-ring (quad ring) is a standard AS568-351 120.01mm ID x 5.33mm CS (4.725\" x 0.210\") size, molded in 70A Buna-N Nitrile. Its outside diameter is 130.67mm (5.144\"). \u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable class=\"bi-specs\"\u003e\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003ePart type\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eX-Ring (Quad Ring)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eStandard size\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eAS568-351\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eInside diameter (ID)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e120.01 mm \/ 4.725 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eCross-section (CS)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e5.33 mm \/ 0.210 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eOutside diameter (OD)\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e130.67 mm \/ 5.144 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eMaterial\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eBuna-N Nitrile\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eHardness\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e70A Shore A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eColor\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cb\u003eTemperature range\u003c\/b\u003e\u003c\/td\u003e\n\u003ctd\u003e-40°F to +250°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\u003c\/table\u003e\u003ch3\u003eWhat It Fits\u003c\/h3\u003e\u003cp\u003eThis size is used across pumps, valves, hydraulic and pneumatic fittings, filter housings, gearboxes, compressors, pressure washers and plumbing. If your manual, parts list or old ring calls for AS568-351 120.01mm ID x 5.33mm CS (4.725\" x 0.210\"), this is the part.\u003c\/p\u003e\u003ch3\u003eWhy Buna-N Nitrile\u003c\/h3\u003e\u003cp\u003eBuna-N is the all-round workhorse of sealing: tough, abrasion resistant and the right default for oil, hydraulic and water service. Recommended for petroleum oils, hydraulic fluid, greases, water, air, and most fuels. Not recommended for brake fluid (glycol), ketones such as acetone or MEK, and long-term sunlight or ozone exposure.\u003c\/p\u003e\u003ch3\u003eYou Can Do This Repair\u003c\/h3\u003e\u003cp\u003eInstall exactly like an o-ring in the same groove: clean, lubricate, and seat it without twisting. X-rings are dimensioned to drop into standard o-ring glands.\u003c\/p\u003e\u003cp\u003e\u003cb\u003ePro Tip:\u003c\/b\u003e A thin coat of \u003ca href=\"https:\/\/beaverislandparts.com\/products\/aqua-flex-food-grade-silicone-lubricant-50g\" target=\"_blank\" rel=\"noopener\"\u003eAqua Flex\u003c\/a\u003e silicone lubricant eases installation, protects the seal on first start-up and extends its life.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eShipping:\u003c\/b\u003e This part is special-ordered and packed for you. It ships from our facility in about 10 business days, then transits by the carrier service you choose at checkout. The estimated delivery date shown on this page includes that lead time.\u003c\/p\u003e\u003ch3\u003eWhy Buy From Beaver Island Parts Company\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cb\u003eEvery dimension published.\u003c\/b\u003e Size, material, hardness and temperature rating are listed up front so you can confirm fit before you buy, not after.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eInspected, packed and labeled by us.\u003c\/b\u003e Each order is checked and repacked in a bag labeled with the part's size and material, so it never gets lost in a parts bin.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReal people who answer fitment questions.\u003c\/b\u003e We are an American family-owned and operated small business. Send us your measurements or model number and we will help you confirm the right part.\u003c\/li\u003e\n\u003cli\u003e\n\u003cb\u003eReplacement guarantee.\u003c\/b\u003e If we ship the wrong item, or it arrives damaged or defective, we replace it free of charge.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cb\u003eQ: Will this fit my equipment?\u003c\/b\u003e\u003cbr\u003eA: It fits any groove or fitting that calls for a AS568-351 120.01mm ID x 5.33mm CS (4.725\" x 0.210\") x-ring (quad ring). Size, not brand, determines fit for standard o-rings. Measure the old o-ring's inside diameter and cross-section with calipers, or better, measure the groove, because a used ring stretches and flattens. Match the material to the fluid: the right size in the wrong rubber will still fail.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eQ: What is Buna-N Nitrile good for?\u003c\/b\u003e\u003cbr\u003eA: It is suited to petroleum oils, hydraulic fluid, greases, water, air, and most fuels. Avoid brake fluid (glycol), ketones such as acetone or MEK, and long-term sunlight or ozone exposure.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eQ: Can I install it myself?\u003c\/b\u003e\u003cbr\u003eA: Yes. Most o-ring replacements take only a pick tool, a clean rag and lubricant. Release pressure, drain the system if needed, remove the old ring, and follow the installation notes above. If it is your first time, take a photo before you take anything apart.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eQ: When will it ship?\u003c\/b\u003e\u003cbr\u003eA: It ships from our facility in about 10 business days, then transits by the carrier service you choose.\u003c\/p\u003e","brand":"Beaver Island Parts Company","offers":[{"title":"1 (Single)","offer_id":48854203007181,"sku":"XR.351.1.BI.STD.B70","price":27.99,"currency_code":"USD","in_stock":true},{"title":"2-Pack","offer_id":48854203039949,"sku":"XR.351.2.BI.STD.B70","price":29.99,"currency_code":"USD","in_stock":true},{"title":"3-Pack","offer_id":48854203072717,"sku":"XR.351.3.BI.STD.B70","price":31.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0611\/8110\/0237\/files\/IMG-069_ec35927b-bb70-4486-ace2-c953326206da.jpg?v=1794358913","url":"https:\/\/beaverislandparts.com\/products\/as568-351-buna-n-nitrile-x-ring-70a-durometer","provider":"Beaver Island Parts Company","version":"1.0","type":"link"}