{"product_id":"mr-o-ring-265-viton-o-ring-7-3-4in-id-90a-pack-of-10-high-temp-seal","title":"Mr O-Ring 265 Viton O-Ring 7-3\/4in ID 90A Pack of 10 - High Temp Seal","description":"\u003cp\u003eIn this review the Mr O-Ring 265 Viton O-Ring pack is evaluated for mechanics, fabricators and hobbyists who need a reliable, high-temperature sealing solution. The bottom line: this pack of ten 90A durometer Viton o-rings delivers consistent dimensions and broad chemical resistance, making it a practical choice when sealing against fuels, oils or high heat is the priority. The reviewer found the nominal and actual sizes closely matched, the material felt firm and resilient, and the specified temperature range makes these o-rings suitable for demanding applications where durability and chemical resistance matter.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Viton (FKM) offers excellent resistance to fuels, mineral oils and many solvents, reducing seal failures in harsh chemical environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e 90A hardness gives a firm seal that resists extrusion and deformation under pressure while still compressing enough to maintain a leak-free joint.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize accuracy:\u003c\/strong\u003e Nominal 7-3\/4in ID and 8in OD with actual measurements very close to spec, which simplifies replacement tasks without resizing concerns.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -26C to 232C (-15F to 450F), suitable for high temperature air, engine compartments and many industrial systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e Comes as a pack of 10, convenient for maintenance cycles or multiple repair points without frequent reordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e Made to the AS568 size standard so these o-rings fit common grooves and housings built to that specification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis product is best for technicians, maintenance crews and DIY mechanics who need a dependable Viton seal for fuel systems, hydraulic fittings and high-temperature assemblies. The firm 90A durometer and broad chemical compatibility make it a practical choice where exposure to petroleum, biodiesel blends, methanol\/ethanol and many oils is expected.\u003c\/p\u003e\n\u003cp\u003eThose who need an ultra-soft seal for delicate low-pressure plumbing or very tight, low-torque fittings might prefer a lower-durometer elastomer. Also, if metric sizes are mandatory for an exact match, verify the listed metric dimensions before ordering.\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 reduces swelling or degradation in fuels, oils and many solvents.\u003c\/li\u003e\n\u003cli\u003e90A durometer provides durable, extrusion-resistant sealing in higher pressure or high-temperature settings.\u003c\/li\u003e\n\u003cli\u003eActual dimensions closely match nominal sizes, easing installation and replacement.\u003c\/li\u003e\n\u003cli\u003ePack of 10 is cost-effective for service kits and multiple repairs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e90A is relatively firm and may be too stiff for applications that require a very soft seal.\u003c\/li\u003e\n\u003cli\u003eViton can be more expensive than general-purpose elastomers, so it may be overkill for benign, low-temperature 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 ID x OD x CS\u003c\/td\u003e\n\u003ctd\u003e7-3\/4in ID, 8in OD, 1\/8in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual ID x OD x CS\u003c\/td\u003e\n\u003ctd\u003e7.734in ID, 8.012in OD, 0.139in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric dimensions\u003c\/td\u003e\n\u003ctd\u003e196.44 mm ID, 203.50 mm OD, 3.53 mm CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e-26C to 232C (-15F to 450F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e10 o-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 265 Viton o-ring pack is a solid choice for anyone needing a high-temperature, chemically resistant seal in automotive, industrial or plumbing tasks. Its close-to-spec actual dimensions, 90A hardness and AS568 sizing make it reliable and easy to swap into existing hardware, offering good value when durability and compatibility are the priority.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these o-rings suitable for fuel and oil exposure?\u003c\/strong\u003e\u003cbr\u003eYes. Viton (FKM) is formulated to resist fuels, diesel blends, mineral oil and many solvents, making these o-rings appropriate for such applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the actual dimensions match the nominal dimensions closely?\u003c\/strong\u003e\u003cbr\u003eYes. The product lists both nominal and actual sizes (for example 7.734in actual ID versus 7-3\/4in nominal), so they are very close and should fit AS568 standard grooves.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan these be used at high temperatures?\u003c\/strong\u003e\u003cbr\u003eYes. The rated temperature range is -26C to 232C (-15F to 450F), suitable for many high-temperature sealing needs.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48640036339931,"sku":"B07R53ZHCV","price":73.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_c1dad5f2-0fc2-437e-9c75-ee922846476f.jpg?v=1778591493","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-265-viton-o-ring-7-3-4in-id-90a-pack-of-10-high-temp-seal","provider":"GearMustHave","version":"1.0","type":"link"}