{"product_id":"mr-o-ring-395-viton-o-ring-90a-durometer-26in-id-durable-seal","title":"Mr O-Ring 395 Viton O-Ring 90A Durometer, 26in ID - Durable Seal","description":"\u003cp\u003eIn this review the Mr O-Ring 395 Viton O-Ring is examined for installers and maintenance technicians who need a high-temperature, chemical-resistant seal in a standard AS568 size. The bottom line: this single-pack Viton o-ring delivers reliable performance across fuels, oils and elevated temperatures thanks to its 90A durometer and fluorocarbon composition, making it a practical choice when compatibility and heat resistance matter more than buying in bulk. The reviewer found the nominal and actual dimensions consistent with expectations for close-tolerance sealing work.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial and resistance:\u003c\/strong\u003e Made of Viton (fluorocarbon rubber), it offers strong resistance to fuels, mineral oils, silicone oils and many organic solvents to reduce seal failures in harsh environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -26C to 232C, the o-ring accommodates both very low and very high temperature service without significant hardening or decomposition.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e The 90A hardness provides a firm cross-section that is suitable for static and some dynamic sealing applications where a stiffer material improves extrusion resistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards and sizing:\u003c\/strong\u003e Sized to meet AS568 standards with nominal 26in ID and precise actual dimensions, helping installers swap into existing grooves and hardware accurately.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVersatile compatibility:\u003c\/strong\u003e Performs well with diesel, biodiesel blends, methanol or ethanol blends and many acids, making it useful across fuel systems and chemical service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShelf life:\u003c\/strong\u003e Effectively unlimited shelf-life for storage, so spare parts inventories remain usable over long maintenance cycles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis o-ring is best for professional plumbers, equipment technicians and industrial maintenance staff who need a single, reliable Viton seal in the AS568 equivalent 26in ID range for repairs or prototyping. Its temperature and chemical resistance make it a sensible choice for fuel systems, hydraulic components and high-temperature housings.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for users who require softer sealing materials for very delicate dynamic shafts or for those who need large multi-packs for production assembly, since this listing is a pack of one and 90A hardness is relatively firm.\u003c\/p\u003e\n\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 heat resistance from \u003cstrong\u003eViton (FKM)\u003c\/strong\u003e material reduces the risk of swelling or degradation in fuel and oil service.\u003c\/li\u003e\n\u003cli\u003ePrecise actual dimensions (25.940in ID, 26.360in OD, 0.210in CS) aid in replacing worn seals without guesswork.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e90A durometer\u003c\/strong\u003e gives good extrusion resistance for demanding static seals.\u003c\/li\u003e\n\u003cli\u003eUnlimited shelf-life makes it convenient to keep a single spare in inventory.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eSingle-piece packaging may not suit users who prefer bulk quantities for repeated production use.\u003c\/li\u003e\n\u003cli\u003e90A hardness can be too firm for some sensitive dynamic sealing applications that require softer materials for shaft conformity.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eMr O-Ring\u003c\/td\u003e\n\u003c\/tr\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\u003e26in ID, 26-3\/8in OD, 3\/16in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual dimensions\u003c\/td\u003e\n\u003ctd\u003e25.940in ID, 26.360in OD, 0.210in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric dimensions\u003c\/td\u003e\n\u003ctd\u003e658.88 mm ID, 669.54 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 (-15F) to 232C (450F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Mr O-Ring 395 Viton O-Ring is a solid choice for field repairs and maintenance when compatibility with fuels, oils and high temperatures is required. Its accurate dimensions and \u003cstrong\u003eViton resistance\u003c\/strong\u003e deliver dependable sealing for industrial and automotive systems, though buyers who need softer materials or bulk quantities should consider alternatives. Overall it represents good value as a single, reliable replacement part.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this o-ring compatible with diesel and biodiesel?\u003c\/strong\u003e\u003cbr\u003eYes. The Viton formulation performs well with diesel and biodiesel blends according to the product description.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the 90A hardness work for dynamic shaft seals?\u003c\/strong\u003e\u003cbr\u003eIt can be used in some dynamic applications, but the 90A durometer is relatively firm and may not conform as well as softer compounds on delicate shafts.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the product meet common sizing standards?\u003c\/strong\u003e\u003cbr\u003eYes. The o-ring is offered to meet AS568 size standards with both nominal and actual dimensions provided for accurate replacement.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48653301121243,"sku":"B07R5Z5CR8","price":93.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_7bb93226-8539-458c-9496-532a7db93623.jpg?v=1778551807","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-395-viton-o-ring-90a-durometer-26in-id-durable-seal","provider":"GearMustHave","version":"1.0","type":"link"}