{"product_id":"447-viton-o-ring-75a-durometer-9-in-id-durable-chemical-seal","title":"447 Viton O-Ring 75A Durometer, 9 in ID - Durable Chemical Seal","description":"\u003cp\u003eIn this review the 447 Viton O-ring is judged on durability, chemical resistance, and fit for common replacement tasks. It is best suited for technicians, hobbyists, and equipment owners who need a robust seal that withstands heat and many fuels; the single biggest reason to buy is the material - \u003cstrong\u003eViton fluorocarbon elastomer\u003c\/strong\u003e - which gives proven resistance to fuels, aromatic and aliphatic hydrocarbons, ozone, and weathering while holding shape at high temperature.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Made of \u003cstrong\u003eViton\u003c\/strong\u003e, the elastomer offers superior resistance to many chemicals and fuels compared with standard rubbers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated for -15 degrees F to 400 degrees F, it stays functional across broad service temperatures encountered in engines and industrial equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape and seal:\u003c\/strong\u003e The round cross-section provides a reliable seal between cylindrical overlapping surfaces, reducing leaks when installed correctly.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e A shore durometer of 75A balances firmness and compressibility for resistance to penetration while still forming an effective gasket under compression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e Meets Aerospace Standard AS568A sizing conventions, which helps when replacing O-rings in equipment that references common O-ring dimensions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Works with non-flammable hydraulic fuels, silicone oils, chlorinated hydrocarbons, and many hydrocarbon fuels, making it versatile for maintenance tasks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis O-ring is aimed at users needing a dependable replacement for equipment exposed to heat and fuels: for example, those servicing fuel bottles, barrel seals, switchback components, or other cylindrical fittings where leak resistance is expected. Mechanics, field technicians, and users of small engines or pneumatic devices will appreciate the material and temperature tolerance.\u003c\/p\u003e\n\u003cp\u003eIt is less suitable for applications exposed to low molecular organic acids, ammonia gas, strong alkalis, amines, glycol-based brake fluids, or super-heated steam; installers working with those substances should seek a different elastomer specifically rated for those chemistries.\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 from \u003cstrong\u003eViton\u003c\/strong\u003e, so it holds up well in high-temperature and fuel-exposed environments.\u003c\/li\u003e\n\u003cli\u003eCustomers report good \u003cstrong\u003efit\u003c\/strong\u003e and leak resistance for common replacements like fuel bottle seals and barrel seals.\u003c\/li\u003e\n\u003cli\u003eDurable 75A hardness that balances resilience and sealing ability, offering strong 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 certain chemicals such as low molecular organic acids, ammonia, alkalis, and glycol-based brake fluids, limiting use in those specific systems.\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\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e9 in ID, 9-1\/2 in OD, 1\/4 in width\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 (-26 degrees C) to 400 degrees F (205 degrees C)\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\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eMeets AS568A sizing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 447 Viton O-ring is a practical, cost-effective choice when you need a heat- and fuel-resistant seal for cylindrical fittings. It is especially good for replacements in fuel-handling and heated environments where \u003cstrong\u003eViton\u003c\/strong\u003e compatibility is required, and offers solid durability and leak resistance for the price; avoid it only when your system uses chemistries incompatible with fluorocarbon elastomers.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this O-ring handle gasoline and diesel?\u003c\/strong\u003e\u003cbr\u003eYes, it is compatible with many fuels and aromatic and aliphatic hydrocarbons, making it suitable for gasoline and diesel exposure.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I use this in high vacuum systems?\u003c\/strong\u003e\u003cbr\u003eYes, Viton is commonly used in high vacuum environments and performs well when outgassing and permeability meet the application requirements.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this safe for brake fluid and ammonia environments?\u003c\/strong\u003e\u003cbr\u003eNo, Viton is vulnerable to glycol-based brake fluids, ammonia, and some alkalis, so choose a different material for those fluids.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48235501813979,"sku":"B0051Y27CY","price":34.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81iyYJCP7YL._SL1500_5146bf50-b0c6-4737-942c-5dc7215437af.jpg?v=1770844396","url":"https:\/\/gearmusthave.com\/products\/447-viton-o-ring-75a-durometer-9-in-id-durable-chemical-seal","provider":"GearMustHave","version":"1.0","type":"link"}