{"product_id":"mr-o-ring-377-viton-o-ring-90a-durometer-10in-id-pack-of-10","title":"Mr O-Ring 377 Viton O-Ring 90A Durometer 10in ID Pack of 10","description":"\u003cp\u003eIn this review the Mr O-Ring 377 Viton O-Ring pack is judged for technicians and maintenance teams who need a reliable, high-temperature sealing option. The bottom line: these 90A durometer Viton rings are best for applications exposed to fuels, oils and high heat where chemical resistance matters most. The review finds the pack of 10 an economical choice for routine replacement and preventive maintenance because the material resists petroleum products, biodiesel blends, silicone oils and ozone throughout a wide operating range.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Fluorocarbon rubber (Viton\/FKM) provides broad chemical resistance so seals last longer in fuel and oil environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e The 90A hardness offers a firm seal that resists extrusion and maintains shape under compression for many static and low-dynamic applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -26C to 232C so these o-rings suit both cold storage and very high temperature service without rapid degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize accuracy:\u003c\/strong\u003e Actual dimensions (9.975in ID, 10.395in OD, 0.210in CS) match nominal sizing needs for predictable replacement in AS568 specified housings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e Supplied as a pack of 10 which is convenient for small crews and scheduled preventative maintenance without buying excess stock.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatility:\u003c\/strong\u003e Performs well with petroleum, methanol or ethanol blends, diesel and biodiesel, and in high vacuum or ozone-exposed systems.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis product suits industrial maintenance crews, HVAC and plumbing technicians, and small fabrication shops that require o-rings resistant to fuels, hydraulic fluids and high temperatures. The firm 90A durometer is useful where a durable, tight seal is needed rather than a very soft gasket.\u003c\/p\u003e\n\u003cp\u003eIt is not ideal for sealing applications that require very soft, highly flexible elastomers (for example low-pressure dynamic shaft seals with heavy flexing) or situations that mandate a different rubber family for compatibility with a specific solvent not listed here.\u003c\/p\u003e\n\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eExcellent chemical and temperature resistance thanks to the Viton (FKM) compound.\u003c\/li\u003e\n\u003cli\u003ePack of 10 provides value for scheduled maintenance and repeat replacements.\u003c\/li\u003e\n\u003cli\u003eAccurate actual dimensions reduce the guesswork when matching AS568 sizes for replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe 90A hardness may be too firm for some dynamic sealing applications that require softer compounds for flexibility.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eViton (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\u003e10in ID, 10-3\/8in OD, 3\/16in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual dimensions\u003c\/td\u003e\n\u003ctd\u003e9.975in ID, 10.395in OD, 0.210in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric dimensions\u003c\/td\u003e\n\u003ctd\u003e253.37 mm ID, 264.03 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 to 232C (-15F to 450F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e10 rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Mr O-Ring 377 Viton 90A o-ring pack is a sensible buy for technicians who need a compact supply of high-temperature, chemically resistant seals. It offers good dimensional accuracy and broad media compatibility, making it a practical, cost-effective choice for fuel, oil and high-heat sealing tasks while remaining less suitable where very soft elastomer behavior is required.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these o-rings suitable for fuel blends?\u003c\/strong\u003e\u003cbr\u003eYes. The Viton compound performs well with petroleum, methanol or ethanol blends, diesel and biodiesel according to the product description.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat temperature range will they tolerate?\u003c\/strong\u003e\u003cbr\u003eThey are rated from -26C (-15F) up to 232C (450F), suitable for cold and very high temperature applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the rings match standard AS568 sizes?\u003c\/strong\u003e\u003cbr\u003eThe product meets size standards defined by AS568 and provides actual dimensions for accurate replacement.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48678526320859,"sku":"B07R43JV18","price":162.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_ad84c1df-1ef5-4be7-80af-e20ea40ab37f.jpg?v=1778619722","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-377-viton-o-ring-90a-durometer-10in-id-pack-of-10","provider":"GearMustHave","version":"1.0","type":"link"}