{"product_id":"475-o-ring-viton-75a-26in-id-26-1-2in-od-1-4in-width-high-heat-seal","title":"475 O-Ring Viton 75A 26in ID 26-1\/2in OD 1\/4in Width - High Heat Seal","description":"\u003cp\u003eIn this review the 475 O-Ring made of brown Viton (75A durometer) is judged on durability and sealing performance for industrial and automotive use. The bottom line: this O-ring is for users who need a heat- and chemical-resistant seal that holds up to fuels and high temperatures. It is most valuable when a precise fit and compatibility with aromatic and aliphatic hydrocarbons, silicone oils, or chlorinated solvents are required. The review finds the O-ring delivers consistent fit and leak prevention for compatible applications while offering good value for routine replacement and repair.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Viton fluorocarbon elastomer provides excellent resistance to fuels, oils, ozone, and weathering for long service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -15 degrees F to 450 degrees F so it can be used in both cold starts and high-heat systems without rapid degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e 75A durometer balances flexibility and compressive strength for reliable sealing in dynamic and static fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape and sizing:\u003c\/strong\u003e Round cross-section with 26 in ID, 26-1\/2 in OD and 1\/4 in width gives a standardized fit for applications calling for this AS568A size.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical compatibility:\u003c\/strong\u003e Compatible with many fuels, aromatic and aliphatic hydrocarbons, silicone oil and chlorinated hydrocarbons for broad application use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e Meets Aerospace Size Standard AS568A which simplifies replacement and cross-referencing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis O-ring is aimed at technicians, mechanics, and maintenance personnel who work with fuel systems, hydraulic fittings, or equipment exposed to high temperatures and aggressive media. It is also useful for hobbyists servicing engines or garden fittings who need a reliable, standardized seal.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users requiring resistance to strong alkalis, ammonia gas or low molecular organic acids, and anyone needing an exact color match to a specific brown shade or a thicker cross section than 1\/4 in. For these cases, alternative elastomers or different durometers may be more suitable.\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 and heat resistance from the Viton material supports long service life in demanding environments.\u003c\/li\u003e\n\u003cli\u003eThe 75A durometer provides a dependable seal in both static and mildly dynamic joints without excessive compression set.\u003c\/li\u003e\n\u003cli\u003eCustomers report good fit, leak prevention, and value for common engine and hose fittings, confirming practical performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eViton is vulnerable to low molecular organic acids, strong alkalis and certain amines, so it is not universal for all chemical exposures.\u003c\/li\u003e\n\u003cli\u003eSome users note the rings are thinner than expected and the color may differ from an anticipated brown, which could matter for visual or thickness-sensitive applications.\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\u003eDurometer\u003c\/td\u003e\n\u003ctd\u003e75A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Diameter (ID)\u003c\/td\u003e\n\u003ctd\u003e26 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e26-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth \/ Cross-section\u003c\/td\u003e\n\u003ctd\u003e1\/4 in (round)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-15 degrees F to 450 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eAerospace Size Standard AS568A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 475 Viton O-ring is a pragmatic choice for anyone needing a standardized, heat- and fuel-resistant seal at a reasonable price. It performs well in engine and plumbing contexts where compatibility with hydrocarbons and elevated temperatures matters, though users exposed to strong alkalis or acids should select a different material. Overall it offers dependable sealing, good fit, and clear value for compatible applications.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this O-ring compatible with gasoline and diesel fuels?\u003c\/strong\u003e\u003cbr\u003eYes, Viton is compatible with many fuels and aromatic and aliphatic hydrocarbons, making it suitable for gasoline and diesel where Viton compatibility is required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this size fit hydraulic or plumbing fittings?\u003c\/strong\u003e\u003cbr\u003eIf your application calls for an AS568A 475 size with a 26 in ID and 1\/4 in cross-section, this ring will fit; verify the specific fitting dimensions before installation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan this O-ring be used at high temperatures continuously?\u003c\/strong\u003e\u003cbr\u003eViton can operate up to 450 degrees F, but continuous exposure at the top end shortens life compared with moderate temperatures, so consider operating conditions when selecting seal material.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48609207877851,"sku":"B00M91BDV8","price":68.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51CHpzVmesL._SL1253_69b67f24-0473-4bf0-8224-771d8a22acdc.jpg?v=1778421285","url":"https:\/\/gearmusthave.com\/products\/475-o-ring-viton-75a-26in-id-26-1-2in-od-1-4in-width-high-heat-seal","provider":"GearMustHave","version":"1.0","type":"link"}