{"product_id":"465-viton-o-ring-90a-durometer-18-in-id-durable-chemical-seal","title":"465 Viton O-Ring 90A Durometer, 18 in ID - Durable Chemical Seal","description":"\u003cp\u003eIn this review the 465 Viton O-Ring is evaluated for mechanical and chemical sealing tasks where heat and fuel resistance matter. The bottom line: this single pack O-ring is aimed at technicians, hobbyists, and equipment owners who need a compact, high-temperature compatible seal; its biggest selling point is the material - \u003cstrong\u003eViton\u003c\/strong\u003e fluorocarbon - which provides broad chemical resistance and a wide operating temperature range, making it a reliable choice for harsh environments.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Made from \u003cstrong\u003eViton\u003c\/strong\u003e fluorocarbon elastomer to resist fuels, aromatic and aliphatic hydrocarbons, and many chemicals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e 90A durometer gives strong resistance to penetration and maintains shape under compression for long-term sealing.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-section:\u003c\/strong\u003e Round cross-section designed to form a tight seal between cylindrical overlapping surfaces for common O-ring applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated for a wide span from -15 degrees F\/-26 degrees C up to 400 degrees F\/205 degrees C for high-heat and low-temperature use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e Manufactured to meet Aerospace Standard AS568A sizes so it fits established O-ring grooves and housings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Suitable for non-flammable hydraulic fuels, silicone oil, trichlorethylene, propane, and use in high vacuum and ozone-exposed conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis O-ring is best for mechanics, HVAC and plumbing technicians, and enthusiasts repairing spa heaters, fuel systems, or small hydraulic assemblies who need a compact 18 in ID seal with high chemical and heat resistance. It is also useful for machine shops and restorers who replace seals on lathes or specialty equipment where Viton compatibility is required.\u003c\/p\u003e\u003cp\u003eThis is not ideal for applications exposed to low molecular weight organic acids, ammonia gas, strong alkalis or amines, or systems that demand extreme softness below the listed hardness; users needing specialist elastomers for those chemistries should seek an alternative material.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExcellent chemical and fuel resistance from the \u003cstrong\u003eViton\u003c\/strong\u003e material, making it durable in harsh environments.\u003c\/li\u003e\n\u003cli\u003eHigh hardness (90A) provides good wear resistance and maintains sealing under compression.\u003c\/li\u003e\n\u003cli\u003eWide temperature tolerance supports both high-heat and colder operating conditions.\u003c\/li\u003e\n\u003cli\u003eMeets AS568A sizing standards for predictable fit in common O-ring grooves.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigher durometer means it is stiffer and may not conform as easily in applications needing a very soft seal.\u003c\/li\u003e\n\u003cli\u003eNot compatible with certain amines, strong alkalis, or low molecular organic acids, limiting use in some chemical environments.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\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 (Hardness)\u003c\/td\u003e\n\u003ctd\u003e90A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCross-section\u003c\/td\u003e\n\u003ctd\u003eRound\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner Diameter (ID)\u003c\/td\u003e\n\u003ctd\u003e18 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e18-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e1\/4 in\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\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe 465 Viton O-Ring is a practical, value-oriented choice for anyone needing a high-temperature, chemically resistant seal that fits standard AS568A dimensions. It is particularly well suited to fuel systems, spa and heater repairs, and equipment that encounters ozone or vacuum conditions; buyers who require softer elastomers or protection from amines and strong alkalis should consider other materials.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill this O-ring work with gasoline and diesel?\u003c\/strong\u003e\u003cbr\u003eYes, the Viton material is compatible with many fuels and aromatic and aliphatic hydrocarbons noted in the product description.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan it be used in high-temperature engine locations?\u003c\/strong\u003e\u003cbr\u003eYes, its rated range to 400 degrees F\/205 degrees C makes it suitable for many high-heat applications, though installation conditions should be checked.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the size standard for replacement in common grooves?\u003c\/strong\u003e\u003cbr\u003eYes, it meets AS568A sizing standards so it should fit corresponding grooves for that Aerospace size.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48255856771291,"sku":"B0051Y2R4M","price":43.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/518tiRee_UL._SL1500_168254c0-88c6-43be-b450-5576e4ad6ecb.jpg?v=1778311744","url":"https:\/\/gearmusthave.com\/products\/465-viton-o-ring-90a-durometer-18-in-id-durable-chemical-seal","provider":"GearMustHave","version":"1.0","type":"link"}