{"product_id":"mr-o-ring-441-viton-o-ring-90a-7in-id-pack-of-10-high-temp-seal","title":"Mr O-Ring 441 Viton O-Ring 90A 7in ID Pack of 10 - High Temp Seal","description":"\u003cp\u003eIn this review the Mr O-Ring 441 Viton O-Ring (90A, pack of 10) is evaluated for technicians and hobbyists who need small, reliable replacement seals that resist fuels, oils and high heat. The bottom line: this is a practical, utility-focused o-ring set for applications where chemical resistance and temperature stability matter most, and the review focuses on real-world fit, material behavior and the advantages of the 90A durometer Viton compound for demanding environments.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e The Viton fluorocarbon rubber formulation offers excellent resistance to fuels, mineral oils and many organic solvents so seals last longer in chemical service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e The 90A hardness balances elasticity and durability, providing a firm seal that resists extrusion in static and low-dynamic installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -26C to 232C (-15F to 450F), the o-ring performs across a wide thermal span useful for engine compartments and heated process lines.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e Supplied as a pack of 10, the set is convenient for maintenance kits and multiple replacement points without buying large quantities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensional accuracy:\u003c\/strong\u003e Nominal and actual dimensions (7in ID nominal, actual 6.975in ID) provide close tolerances for predictable fit in AS568-equivalent grooves.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe 441 Viton o-ring is best for mechanics, plumbers and equipment maintainers who work with petroleum products, fuel blends, hydraulic fluids or areas exposed to high temperatures and ozone. Its combination of chemical resistance and 90A hardness suits applications such as fuel system seals, pump covers and static flange joints where durability is required.\u003c\/p\u003e\n\u003cp\u003eThose needing extremely soft, low-pressure seals or food-grade elastomers should look elsewhere, since Viton 90A is a relatively firm fluorocarbon compound and is chosen mainly for chemical and heat resistance rather than for very low compression set or regulatory food-contact grades.\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 keeps seals intact in fuels, oils and many solvents.\u003c\/li\u003e\n\u003cli\u003eWide usable temperature range supports applications from cold storage to elevated process temperatures.\u003c\/li\u003e\n\u003cli\u003eConsistent dimensional tolerances (actual vs nominal) make replacements straightforward.\u003c\/li\u003e\n\u003cli\u003ePack of 10 provides immediate spare parts for routine maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAt 90A durometer the o-ring is relatively firm and may not be ideal for very low-pressure sealing or where extreme flexibility is required.\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) fluorocarbon rubber\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\u003e7in ID, 7-1\/2in OD, 1\/4in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual dimensions\u003c\/td\u003e\n\u003ctd\u003e6.975in ID, 7.525in OD, 0.275in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric dimensions\u003c\/td\u003e\n\u003ctd\u003e177.17 mm ID, 191.15 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\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003ePack of 10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Mr O-Ring 441 Viton 90A pack of 10 is a strong choice for anyone who needs reliable chemical and heat-resistant seals without buying large volumes. It is good value for maintenance use and applications exposed to fuels, oils and high temperatures, provided a firmer 90A compound suits the sealing requirement rather than a softer elastomer.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these o-rings compatible with diesel and biodiesel blends?\u003c\/strong\u003e\u003cbr\u003eYes, the Viton formulation is suited to diesel and common biodiesel blends and resists degradation from petroleum-based fuels.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the 90A hardness work for static flange seals?\u003c\/strong\u003e\u003cbr\u003eThe 90A durometer is appropriate for many static seals where extrusion resistance and durability are needed, though softer compounds may seal better in very low-pressure applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these meet standard AS568 sizes?\u003c\/strong\u003e\u003cbr\u003eYes, the product is offered to match AS568 size standards and lists both nominal and actual dimensions for reliable fitting.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48689758568667,"sku":"B07R542MPX","price":159.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_8095ad1f-f451-4d3c-81e6-cfc5a8f56786.jpg?v=1778701656","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-441-viton-o-ring-90a-7in-id-pack-of-10-high-temp-seal","provider":"GearMustHave","version":"1.0","type":"link"}