{"product_id":"m2-5x113-viton-o-ring-75a-durometer-durable-chemical-seal","title":"M2.5x113 Viton O-Ring 75A Durometer - Durable Chemical Seal","description":"\u003cp\u003eIn this review the M2.5x113 Viton O-Ring is assessed for practical sealing tasks where chemical and heat resistance matter. The bottom line: this pack of ten O-rings is aimed at technicians, hobbyists, and mechanics who need a reliable, compact seal for cylindrical joints and threaded protectors, and its single biggest advantage is the Viton compound that maintains sealing performance across a wide temperature range. The reviewer found these rings particularly useful where fuel, oil, or aromatic hydrocarbons are present and where a 75A hardness balances flexibility and compression set resistance.\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 fluorocarbon elastomer, the O-ring resists many fuels and chemicals commonly encountered in automotive and industrial service.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated for use over a broad span, the O-ring handles both subfreezing and elevated temperatures typical in engine and hydraulic environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer 75A:\u003c\/strong\u003e The 75A hardness provides a firm seal that holds shape under compression while remaining compliant enough for threaded and cylindrical mating surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound cross-section:\u003c\/strong\u003e The classic round profile creates an effective seal between overlapping cylindrical parts such as barrels, shafts, and housings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack of 10:\u003c\/strong\u003e Supplied in a multi-pack that offers spare parts for repeated installations or for protecting multiple threaded barrels or fittings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis O-ring is best for mechanics, maintenance technicians, and DIYers who service fuel systems, carburetors, hydraulic fittings, or threaded protectors and need a resilient seal against hydrocarbons and oils. It is also useful for projects where compatibility with silicone oils and many aromatic and aliphatic hydrocarbons is required.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users needing compatibility with strong alkalis, ammonia gas, or glycol-based brake fluids, since Viton is vulnerable to those media; likewise, if an ultra-soft or very hard compound is required, different durometer options would be a better fit.\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\u003eGood chemical and fuel resistance from the Viton material for many industrial fluids and fuels.\u003c\/li\u003e\n\u003cli\u003eWide operational temperature capability useful in engine and hot-process contexts.\u003c\/li\u003e\n\u003cli\u003e75A hardness strikes a practical balance for sealing threaded barrels and cylindrical joints without excessive deformation.\u003c\/li\u003e\n\u003cli\u003eCustomers report reliable fit and value, with specific success on Springfield threaded barrels and DRZ 400 carburetor seats.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot compatible with strong alkalis, amines, or glycol-based brake fluids, so it is not universally chemical-proof.\u003c\/li\u003e\n\u003cli\u003eOnly one size and durometer in the pack, so it does not cover other bore or hardness needs.\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 (fluorocarbon elastomer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner diameter (ID)\u003c\/td\u003e\n\u003ctd\u003e113 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e118 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCross-section width\u003c\/td\u003e\n\u003ctd\u003e2.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDurometer\u003c\/td\u003e\n\u003ctd\u003e75A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e-15 degrees F (-26 degrees C) to 400 degrees F (205 degrees C)\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 M2.5x113 Viton O-Ring is a practical, cost-effective choice for anyone needing a durable seal against fuels, oils, and many chemicals at varied temperatures. It is particularly good value for repairs and maintenance where a 75A hardness and the specified diameter match the application; however, those requiring resistance to alkalis or glycol-based fluids should consider alternate materials.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these O-rings suitable for fuel applications?\u003c\/strong\u003e\u003cbr\u003eYes; Viton offers good resistance to many fuels, aromatic and aliphatic hydrocarbons, and silicone oils, making these rings suitable for many fuel-related seals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the 75A hardness work on threaded barrel protectors?\u003c\/strong\u003e\u003cbr\u003eCustomers report the 75A durometer works well to keep thread protectors and similar fittings in place without excessive deformation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan these O-rings be used with brake fluid?\u003c\/strong\u003e\u003cbr\u003eNo; Viton is vulnerable to glycol-based brake fluids, so these O-rings are not recommended for that use.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48235431198939,"sku":"B00NR1CAAC","price":59.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71lVOM9LZJL._SL1500_5112ca5b-4ea1-4892-853c-63131948ea6e.jpg?v=1770758164","url":"https:\/\/gearmusthave.com\/products\/m2-5x113-viton-o-ring-75a-durometer-durable-chemical-seal","provider":"GearMustHave","version":"1.0","type":"link"}