{"product_id":"mr-o-ring-454-viton-o-ring-90a-durometer-12-1-2-in-id-durable-seal","title":"Mr O-Ring 454 Viton O-Ring 90A Durometer, 12-1\/2 in ID - Durable Seal","description":"\u003cp\u003eIn this review the Mr O-Ring 454 Viton O-Ring is judged as a specialist sealing component for demanding environments; it is best for technicians and maintenance teams who need a heat- and chemical-resistant o-ring that holds tolerances. The bottom line: the 90A durometer Viton compound delivers reliable resistance to fuels, oils and high temperatures while matching AS568 size standards, so it is a practical choice when compatibility with petroleum products and a wide temperature range matters.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 454 Viton (FKM) provides excellent resistance to fuels, mineral oils and many organic solvents, reducing seal degradation in contact with harsh fluids.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e 90A durometer gives a firm cross-section that resists extrusion while still forming a reliable static seal under compression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -26C to 232C (-15F to 450F), allowing use in both low-temperature and very high-temperature service without rapid loss of properties.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDimensional accuracy:\u003c\/strong\u003e Nominal and actual dimensions are closely matched (12-1\/2 in ID nominal, actual 12.475 in ID), making this O-ring suitable where AS568 sizing and fit are important.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical versatility:\u003c\/strong\u003e Performs well with diesel, biodiesel blends, methanol or ethanol blends, silicone oils, and even strong acids in many applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShelf-life:\u003c\/strong\u003e Effectively unlimited shelf-life when stored properly, so spares can be kept on hand without concern for expiry.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Mr O-Ring 454 Viton 90A is aimed at professionals in hydraulics, plumbing maintenance, and industrial service who need a resilient seal that tolerates fuels, high temperatures and aggressive fluids. It is ideal for repair shops, industrial maintenance departments and OEMs specifying AS568-compatible Viton seals.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users needing extremely soft or elastic seals for low-pressure dynamic rotary shafts (a softer compound may be better) or applications requiring temperatures below -26C for extended periods, where a different elastomer with better low-temperature flexibility would be preferable.\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 heat resistance from the \u003cstrong\u003eViton FKM\u003c\/strong\u003e compound for petroleum and solvent exposure.\u003c\/li\u003e\n\u003cli\u003eAccurate sizing with nominal and actual dimensions that align to AS568 expectations, easing replacement.\u003c\/li\u003e\n\u003cli\u003eFirm 90A hardness resists extrusion and maintains a reliable static seal in many systems.\u003c\/li\u003e\n\u003cli\u003eLong storage life means spares can be stocked without frequent turnover.\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 is relatively firm, so it may not be the best choice for low-pressure dynamic shaft seals where a softer material is preferred.\u003c\/li\u003e\n\u003cli\u003eNot specified for specialized food-grade or medical use in the provided details, so verification is required for those markets.\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\u003e454 Viton (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 (ID x OD x CS)\u003c\/td\u003e\n\u003ctd\u003e12-1\/2 in ID, 13 in OD, 1\/4 in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual dimensions (ID x OD x CS)\u003c\/td\u003e\n\u003ctd\u003e12.475 in ID, 13.025 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\u003e316.87 mm ID, 330.85 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\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Mr O-Ring 454 Viton 90A is a solid choice for industrial and maintenance use where chemical and heat resistance are required; professionals replacing AS568 sizes will appreciate the accurate dimensions and long shelf-life. It represents good value when a durable, petroleum-resistant seal is needed, though applications demanding softer dynamic sealing should consider alternative durometers.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this O-ring compatible with diesel and biodiesel blends?\u003c\/strong\u003e\u003cbr\u003eYes, the Viton FKM compound is specified to perform well with diesel and biodiesel blends as listed in the product details.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 90A hardness work for static and dynamic seals?\u003c\/strong\u003e\u003cbr\u003e90A is well suited to static seals and many low- to moderate-pressure applications; for high-speed dynamic shafts a softer compound might be preferable.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the size match industry standards?\u003c\/strong\u003e\u003cbr\u003eYes, this O-ring is intended to meet AS568 size standards and actual dimensions are provided to confirm fit.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48197237604571,"sku":"B07R735PN2","price":52.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_f1c80674-f060-4bbf-b1c0-a31c38d271bf.jpg?v=1770216041","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-454-viton-o-ring-90a-durometer-12-1-2-in-id-durable-seal","provider":"GearMustHave","version":"1.0","type":"link"}