{"product_id":"356-viton-o-ring-75a-durometer-5-3-8in-id-heat-and-chemical","title":"356 Viton O-Ring 75A Durometer, 5-3\/8in ID - Heat and Chemical","description":"\u003cp\u003eOur review of the 356 Viton O-ring finds it best suited for technicians and home mechanics who need a reliable replacement seal that resists heat, fuels and many solvents. The single biggest reason to buy is material performance: made from Viton fluorocarbon elastomer with a 75A durometer, this O-ring holds up across a broad temperature range and resists common hydrocarbon fuels, making it a practical choice where leak resistance and chemical compatibility matter.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eViton construction:\u003c\/strong\u003e Provides superior resistance to fuels, aromatic and aliphatic hydrocarbons, and many chlorinated solvents, reducing swell and degradation in demanding environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide temperature range:\u003c\/strong\u003e Rated from -15 degrees F to 400 degrees F so it can be used in hot engine or industrial applications as well as cooler conditions without rapid hardening or softening.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e75A durometer:\u003c\/strong\u003e The medium-hard Shore hardness offers good resistance to penetration and extrusion while still compressing to form effective leak-tight seals between overlapping cylindrical surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRound cross-section:\u003c\/strong\u003e Classic O-ring geometry ensures reliable sealing in standard grooves and between mating cylinders for general hydraulic and pneumatic use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack of five:\u003c\/strong\u003e Multiple pieces in one purchase make it convenient for replacing several seals or keeping spares on hand for routine maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis O-ring is for professionals and hobbyists who need a robust replacement for fuel-system seals, hydraulic fittings, or barrel and bottle seals where compatibility with fuels and solvents is required. It is particularly useful for applications that see elevated temperatures or exposure to aromatic hydrocarbons.\u003c\/p\u003e\n\u003cp\u003eIt is not the best choice where the seal will sit in contact with strong alkalis, ammonia gas, glycol-based brake fluids, or super-heated steam, as Viton is vulnerable to those media; users working mainly with those chemicals should seek a material specified for that exposure.\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\u003eExcellent chemical and fuel resistance for a wide range of hydrocarbon-based fluids.\u003c\/li\u003e\n\u003cli\u003ePerforms well at high temperatures up to 400 degrees F, maintaining shape and sealing ability.\u003c\/li\u003e\n\u003cli\u003eCustomers report good fit and leak resistance in common replacement uses, offering solid value for money.\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 low molecular weight organic acids, amines, strong alkalis or super-heated steam, limiting its use in some specialty chemical environments.\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner diameter\u003c\/td\u003e\n\u003ctd\u003e5-3\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter diameter\u003c\/td\u003e\n\u003ctd\u003e5-3\/4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth \/ cross-section\u003c\/td\u003e\n\u003ctd\u003e3\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDurometer\u003c\/td\u003e\n\u003ctd\u003e75A Shore\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e-15 degrees F to 400 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThis 356 Viton O-ring is a dependable, cost-effective replacement for fuel, hydraulic and general sealing jobs where hydrocarbon compatibility and high-temperature resilience are needed. For anyone replacing seals on fuel bottles, barrels or similar assemblies, it delivers consistent leak resistance and durability, though users handling strong acids, alkalis or steam should choose a different material.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this O-ring suitable for fuel systems?\u003c\/strong\u003e\u003cbr\u003eYes. Viton is compatible with many fuels and aromatic hydrocarbons, making this O-ring suitable for most fuel-system sealing tasks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it handle high temperatures?\u003c\/strong\u003e\u003cbr\u003eYes. The O-ring is rated to 400 degrees F, so it performs well in hot environments common to engines and industrial equipment.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre there fluids to avoid?\u003c\/strong\u003e\u003cbr\u003eYes. Avoid prolonged contact with low molecular weight organic acids, ammonia, alkalis, amines, glycol-based brake fluids and super-heated steam, as Viton can be degraded by them.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48226313208027,"sku":"B000FMWRAY","price":34.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81iyYJCP7YL._SL1500_942bf841-1832-4edf-9514-c1950a5614d1.jpg?v=1770835720","url":"https:\/\/gearmusthave.com\/products\/356-viton-o-ring-75a-durometer-5-3-8in-id-heat-and-chemical","provider":"GearMustHave","version":"1.0","type":"link"}