{"product_id":"474-viton-o-ring-75a-25-in-id-25-1-2-in-od-durable-chemical-seal","title":"474 Viton O-Ring 75A, 25 in ID 25-1\/2 in OD - Durable Chemical Seal","description":"\u003cp\u003eIn this review the 474 Viton O-Ring is evaluated for mechanics, HVAC technicians, and hobbyists who need a durable seal that resists heat, fuels, and many chemicals. The bottom line: this pack of 25 Viton rings stands out because the fluorocarbon compound holds up across a wide temperature range and keeps reliable leak resistance in demanding conditions. For anyone replacing seals on fuel fittings, hydraulic components, or high-temperature assemblies, the key selling point is the material performance rather than cosmetic or specialty fittings.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Made of Viton fluorocarbon elastomer for strong resistance to fuels and many chemicals, reducing premature swell and degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -15 degrees F to 400 degrees F so it can be used in both cold storage and high-heat engine or exhaust environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e 75A hardness offers good resistance to penetration and extrusion while maintaining a flexible seal on cylindrical surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-section:\u003c\/strong\u003e Round profile provides a dependable seal between overlapping cylindrical parts, which is the common O-ring seating geometry.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e Supplied as a pack of 25, making it convenient for maintenance shops or bulk replacements without multiple orders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e Meets the AS568A size standard so it fits typical glands and housings designed for that specification.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe 474 Viton O-Ring is best for technicians and DIYers who work with non-flammable hydraulic fuels, petroleum-based fluids, and applications that see elevated temperatures. It is particularly useful when a heat-resistant, fuel-resistant seal is required, such as fuel bottle fittings, certain plumbing joints, and sealed cooling loops where higher temperature tolerance is needed.\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 has vulnerabilities to those chemicals. Also, if a lower hardness or a softer compound is required for very low-pressure static seals, a different durometer may 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 for long-lasting performance in hot fuel and industrial environments.\u003c\/li\u003e\n\u003cli\u003eConsistent leak resistance and durability, reported by customers using them as replacements for fuel bottle fittings and PC watercooling.\u003c\/li\u003e\n\u003cli\u003eGood value in a pack of 25 for maintenance needs and multiple replacements.\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, certain amines, and glycol-based brake fluids, so chemical compatibility must be confirmed before use.\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\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner diameter (ID)\u003c\/td\u003e\n\u003ctd\u003e25 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e25-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCross-section\/Width\u003c\/td\u003e\n\u003ctd\u003e1\/4 in\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 to 400 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 474 Viton O-Ring pack is a practical choice for anyone needing reliable, heat- and fuel-resistant seals at a reasonable bulk price. It is especially suited to repair work and routine replacement where AS568A dimensions and a 75A hardness are required. Confirm chemical compatibility for acids or alkalis, but otherwise this is a durable, cost-effective solution for industrial and hobby sealing tasks.\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. The Viton compound is compatible with many fuels and aromatic hydrocarbons and provides strong resistance in fuel systems when used with compatible fluids.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat temperatures can these rings withstand?\u003c\/strong\u003e\u003cbr\u003eThey are usable from -15 degrees F up to 400 degrees F, making them suitable for both cold and high-temperature service.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these o-rings fit standard housings?\u003c\/strong\u003e\u003cbr\u003eYes. They conform to the AS568A standard size series and will fit glands designed for that specification.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48198781796571,"sku":"B000FOLPAA","price":105.39,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81iyYJCP7YL._SL1500_f3e96528-f1ae-4bb9-85d2-4563b36ddcdd.jpg?v=1770264785","url":"https:\/\/gearmusthave.com\/products\/474-viton-o-ring-75a-25-in-id-25-1-2-in-od-durable-chemical-seal","provider":"GearMustHave","version":"1.0","type":"link"}