{"product_id":"mr-o-ring-411-viton-o-ring-90a-durometer-pack-of-5","title":"Mr O-Ring 411 Viton O-Ring 90A Durometer - Pack of 5","description":"\u003cp\u003eIn this review the Mr O-Ring 411 Viton o-ring is evaluated for workshop and industrial sealing tasks where high temperature and chemical resistance matter. The bottom line: this pack of five 90A durometer Viton rings is aimed at technicians, hobbyists, and maintenance teams who need durable seals that withstand petroleum products, fuels, oils and elevated temperatures up to 232C. The reviewer found the rings reliably sized to AS568 standards and especially useful when compatibility with fuels, oils and harsh environments is the primary concern.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Made from Viton (FKM), the o-ring offers excellent resistance to high temperatures and many solvents for dependable sealing in harsh media.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e The 90A hardness gives a firm cross-section that holds shape under compression while still forming an effective seal in static and some dynamic applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensions:\u003c\/strong\u003e Nominal 2-3\/4 in ID and 3-1\/4 in OD with actual dimensions close to 2.725 in ID and 3.275 in OD, which matches AS568 sizing expectations for interchangeability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical compatibility:\u003c\/strong\u003e Performs well with petroleum products, fuel blends with methanol or ethanol, diesel and biodiesel blends, mineral oils and silicone greases, reducing the need for multiple seal types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -26C (-15F) to 232C (450F), suitable for high-temperature air and many process environments where standard rubbers would fail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e Supplied as a pack of five, convenient for small repair jobs or stocking spares without excess inventory.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis o-ring is best for maintenance technicians, hydraulic and pneumatic specialists, and small fabrication shops that require a robust seal tolerant of fuels, oils, ozone and elevated temperatures. It is also a good choice for home mechanics replacing seals exposed to fuel or high heat.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users needing very soft, low-durometer seals for delicate dynamic shafts or extreme low-temperature flexibility beyond the listed range; for those applications a different elastomer or lower durometer compound will perform better.\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 and temperature resistance from the Viton (FKM) compound for long-term reliability.\u003c\/li\u003e\n\u003cli\u003eAccurate actual and nominal dimensions that conform to AS568 sizing for easy replacement.\u003c\/li\u003e\n\u003cli\u003e90A durometer provides a firm, durable seal suitable for many static and some dynamic uses.\u003c\/li\u003e\n\u003cli\u003ePack of five offers immediate spares for quick maintenance tasks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e90A hardness may be too stiff for applications needing very soft or highly elastic sealing under low compression.\u003c\/li\u003e\n\u003cli\u003eViton is not the lowest-cost elastomer, so it may be more expensive than generic rubber options for low-demand uses.\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\u003e2-3\/4 in ID, 3-1\/4 in OD, 1\/4 in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual Dimensions\u003c\/td\u003e\n\u003ctd\u003e2.725 in ID, 3.275 in OD, 0.275 in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric Dimensions\u003c\/td\u003e\n\u003ctd\u003e69.22 mm ID, 83.20 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 Quantity\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\u003eThe Mr O-Ring 411 Viton 90A pack of five is a practical choice for professionals and hobbyists who need a heat- and chemical-resistant seal that fits AS568 sizes. Its firm 90A hardness and reliable dimensions make it good value for sealing petrol, oils and high-temperature applications, while the pack size keeps spare parts on hand without overspending.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these o-rings compatible with diesel and biodiesel?\u003c\/strong\u003e\u003cbr\u003eYes, the Viton compound is specified to perform well with diesel and blends with biodiesel and resists common fuel components.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these rings match AS568 sizes for replacements?\u003c\/strong\u003e\u003cbr\u003eYes, the product is offered to meet size standards defined by AS568, with both nominal and actual dimensions provided.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat temperature range can these o-rings handle?\u003c\/strong\u003e\u003cbr\u003eThe rings are rated from -26C (-15F) up to 232C (450F), suitable for many high-temperature sealing needs.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48615050379483,"sku":"B07R72SW3P","price":52.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_19720d9a-b23d-4b61-9621-1ab715a53a0f.jpg?v=1778408699","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-411-viton-o-ring-90a-durometer-pack-of-5","provider":"GearMustHave","version":"1.0","type":"link"}