{"product_id":"mr-o-ring-442-viton-o-ring-90a-7-1-4in-id-pack-of-5-high-temp-seal","title":"Mr O-Ring 442 Viton O-Ring 90A 7-1\/4in ID Pack of 5 - High Temp Seal","description":"\u003cp\u003eIn this review the Mr O-Ring 442 Viton O-Ring pack is examined for technicians, mechanics and DIYers who need a durable, high-temperature seal. The bottom line: this pack of five 90A durometer Viton o-rings stands out for broad chemical and temperature resistance, making it a dependable choice where petroleum, fuels, silicone oils or elevated heat are present. The reviewer found the size accuracy, material resilience and clear temperature specs to be the single biggest reasons to choose these o-rings for demanding sealing tasks.\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) offers excellent resistance to oils, fuels and many organic solvents, reducing seal failures in chemical environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature Range:\u003c\/strong\u003e Rated from -26C (-15F) to 232C (450F), these o-rings maintain sealing performance across typical automotive and industrial temperature extremes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e A 90A hardness provides a firm cross-section that resists extrusion and maintains a reliable compression set for longer service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensional Accuracy:\u003c\/strong\u003e Nominal and actual dimensions (7-1\/4in ID, 7-3\/4in OD; actual 7.225in ID, 7.775in OD) match common AS568 sizing standards for predictable fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Performs well with petroleum products, methanol or ethanol blends, diesel and biodiesel, and many greases, making it suitable for fuel systems and hydraulic seals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack Quantity:\u003c\/strong\u003e Supplied as a pack of five, useful for multiple service jobs or keeping spares on hand without buying large bulk quantities.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Mr O-Ring 442 Viton o-rings are well suited to professional mechanics, maintenance technicians and advanced DIYers who work with fuel systems, hydraulic components or equipment exposed to high heat and aggressive fluids. Anyone needing AS568-compatible sizes and a firmer 90A compound will find these rings practical for repair and preventative maintenance.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users who need a softer sealing material for low-pressure, delicate seals or applications below the stated temperature floor; silicone or nitrile alternatives may be a better fit where extreme cold flexibility or lower hardness is required.\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\u003eHigh chemical resistance to fuels, oils and many solvents reduces leak risk in harsh environments.\u003c\/li\u003e\n\u003cli\u003eWide temperature tolerance allows use in both high-heat and common cold conditions without rapid degradation.\u003c\/li\u003e\n\u003cli\u003eAccurate AS568-equivalent dimensions help ensure a predictable fit in standardized grooves and housings.\u003c\/li\u003e\n\u003cli\u003ePack of five offers value for multiple repairs or spare parts storage.\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 is relatively stiff and may not seal optimally in low-pressure or highly irregular surfaces that need a softer compound.\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\u003e7-1\/4in ID, 7-3\/4in OD, 1\/4in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual Dimensions\u003c\/td\u003e\n\u003ctd\u003e7.225in ID, 7.775in OD, 0.275in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric Dimensions\u003c\/td\u003e\n\u003ctd\u003e183.52 mm ID, 197.50 mm OD, 6.99 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 Size\u003c\/td\u003e\n\u003ctd\u003e5 rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThese Mr O-Ring 442 Viton rings are a practical, cost-effective choice for users needing durable seals in fuel, oil and high-temperature settings. The combination of 90A hardness, accurate AS568-compatible sizing and wide chemical compatibility makes them a strong value for maintenance shops and serious DIYers, while softer-seal users should consider alternate compounds.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these o-rings resistant to gasoline and diesel?\u003c\/strong\u003e\u003cbr\u003eYes, the Viton FKM compound is specifically noted for good performance with petroleum products, gasoline blends and diesel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill these work at high temperatures?\u003c\/strong\u003e\u003cbr\u003eYes, they are rated to 232C (450F) and are suitable for many high-temperature sealing applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the dimensions match AS568 sizes?\u003c\/strong\u003e\u003cbr\u003eThe product follows AS568-defined size standards with nominal and actual dimensions provided for predictable compatibility.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48195573383387,"sku":"B07R85JDXH","price":112.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_8476c7fd-51ac-4c41-baed-6fa72fa47e44.jpg?v=1770230330","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-442-viton-o-ring-90a-7-1-4in-id-pack-of-5-high-temp-seal","provider":"GearMustHave","version":"1.0","type":"link"}