{"product_id":"mr-o-ring-373-viton-o-ring-90a-durometer-9-in-id-pack-of-5","title":"Mr O-Ring 373 Viton O-Ring 90A Durometer, 9 in ID - Pack of 5","description":"\u003cp\u003eIn this review the focus is a practical, industrial-grade sealing option for engineers, mechanics and maintenance techs who need reliable resistance to fuels, oils and heat. The Mr O-Ring 373 Viton o-ring is a 90A durometer Fluorocarbon rubber designed for demanding environments; the single biggest reason to consider it is its compatibility with petroleum products and wide temperature range, which makes it useful where other elastomers fail. This pack of five offers spares for routine maintenance and reduces downtime when matched to the right AS568 size.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Viton FKM composition delivers excellent resistance to fuels, mineral oil and many organic solvents for longer seal life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e 90A hardness provides a firm cross-section that holds shape under pressure while maintaining a reliable seal in many systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated -26C to 232C (-15F to 450F), allowing use in both cold starts and very hot service conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize accuracy:\u003c\/strong\u003e Nominal and actual dimensions are listed, so users can match this o-ring to AS568 size equivalents with confidence.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e Supplied in a pack of 5 to keep spares on hand for routine replacement without buying bulk quantities.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe o-ring is ideal for technicians and maintenance teams working on fuel systems, hydraulic equipment or any application exposed to petroleum, diesel, or high temperatures who need a compact, dependable seal that meets common size standards. Contractors who service engines, pumps or industrial valves will appreciate the Viton compatibility with aromatics, strong acids and silicone oils.\u003c\/p\u003e\u003cp\u003eIt is less suited for users who need very soft, low-durometer seals for light compression applications or where food-grade compliance is mandatory; those users should choose a different material or hardness. Also, if metric-only specs are required, confirm dimensions carefully against the provided metric values.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExcellent chemical resistance to fuels, oils and many solvents, making it durable in harsh fluids.\u003c\/li\u003e\n\u003cli\u003eHigh temperature capability to 232C (450F) supports hot-system use without rapid degradation.\u003c\/li\u003e\n\u003cli\u003eAS568-compatible dimensions and clearly stated actual measurements help ensure the right fit.\u003c\/li\u003e\n\u003cli\u003ePack of five provides convenient spares for scheduled maintenance and repairs.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAt 90A durometer the o-ring is relatively firm and may not be ideal where very soft sealing compression is required.\u003c\/li\u003e\n\u003cli\u003eNot intended for applications requiring food-grade elastomers or extreme low-temperature flexibility below -26C.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eViton (Fluorocarbon rubber, FKM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDurometer\u003c\/td\u003e\n\u003ctd\u003e90A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Dimensions\u003c\/td\u003e\n\u003ctd\u003e9 in ID, 9-3\/8 in OD, 3\/16 in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual Dimensions\u003c\/td\u003e\n\u003ctd\u003e8.975 in ID, 9.395 in OD, 0.210 in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric Dimensions\u003c\/td\u003e\n\u003ctd\u003e227.97 mm ID, 238.63 mm OD, 5.33 mm CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-26C (-15F) to 232C (450F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Quantity\u003c\/td\u003e\n\u003ctd\u003e5 o-rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Mr O-Ring 373 Viton 90A o-ring is a solid choice for industrial and mechanical users who need a compact, high-temperature resistant seal compatible with petroleum and many chemicals. It offers clear sizing, reliable chemical resistance and a pack size useful for maintenance crews; those needing very soft seals or food-safe materials should consider alternatives.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this o-ring compatible with gasoline and diesel?\u003c\/strong\u003e\u003cbr\u003eYes, the Viton FKM formulation is rated for petroleum products including gasoline and diesel, as well as biodiesel blends.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat are the actual dimensions versus nominal?\u003c\/strong\u003e\u003cbr\u003eThe listing provides both: actual dimensions are 8.975 in ID, 9.395 in OD, 0.210 in cross-section while nominal is 9 in ID, 9-3\/8 in OD, 3\/16 in CS.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan it be used at very high temperatures?\u003c\/strong\u003e\u003cbr\u003eYes, the service range goes up to 232C (450F), suitable for many high-temperature applications.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48617751085275,"sku":"B07R62R7BH","price":89.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_01b87d4c-1ba8-4241-bc2f-ef680c155fea.jpg?v=1778498125","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-373-viton-o-ring-90a-durometer-9-in-id-pack-of-5","provider":"GearMustHave","version":"1.0","type":"link"}