{"product_id":"447-viton-o-ring-75a-durometer-9-in-id-durable-chemical-resistant","title":"447 Viton O-Ring 75A Durometer 9 in ID - Durable Chemical Resistant","description":"\u003cp\u003eIn this review the 447 Viton O-Ring is presented as a practical replacement seal for technicians, hobbyists, and maintenance crews who need a small, reliable O-ring with strong chemical and heat resistance. The review finds the pack of five best suited to applications where fuel resistance, heat tolerance, and precise fit matter, and highlights the single biggest reason to buy: this O-ring uses Viton fluorocarbon elastomer and a 75A durometer to resist fuels, aromatic and aliphatic hydrocarbons, and high temperatures where many generic elastomers would fail.\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 to provide superior resistance to fuels, oils, ozone, and many chemicals compared with standard nitrile rubber.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated for use from -15 degrees F to 400 degrees F so it can handle high-heat engine and industrial environments without rapid degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e 75A durometer offers firm resistance to penetration and extrusion while still allowing a conforming seal on cylindrical mating surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeometry:\u003c\/strong\u003e Round cross-section and precise 9 in inner diameter and 9-1\/2 in outer diameter dimensions give a consistent seal between overlapping cylindrical parts where proper O-ring sizing is critical.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical compatibility:\u003c\/strong\u003e Suitable for non-flammable hydraulic fuels, silicone oil, chlorinated and aromatic hydrocarbons, and high vacuum environments for broad application use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e Sold in a pack of five so replacements and spares are available for routine maintenance or multiple installations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe 447 Viton O-Ring is geared toward professionals and informed hobbyists who need a resilient seal for fuel systems, hydraulic fittings, or outdoor gear exposed to heat and ozone. It is particularly useful where customers have reported fit and leak resistance in applications such as fuel bottle seals, firearm barrel seals, and silencer switchbacks.\u003c\/p\u003e\n\u003cp\u003eThose who require compatibility with glycol-based brake fluids, strong alkalis, or ammonia gas should look elsewhere, as Viton is vulnerable to certain low molecular organic acids and amines. For simple low-temperature water seals where cost is the only concern, a standard elastomer may be more economical.\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 fuel resistance that maintains sealing performance in high-heat conditions.\u003c\/li\u003e\n\u003cli\u003eCustomers report accurate fit and reliable leak resistance in fuel bottle and firearm seal replacements.\u003c\/li\u003e\n\u003cli\u003e75A hardness balances durability and sealing conformity for cylindrical overlap applications.\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 glycol-based brake fluids, strong alkalis, or some amines, so it is not universal for all chemical exposures.\u003c\/li\u003e\n\u003cli\u003eHigher-cost elastomer compared with basic nitrile O-rings, which may be unnecessary for low-stress water-only uses.\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\u003eDurometer (Shore)\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\u003e9 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e9-1\/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\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 447 Viton O-Ring is a sensible purchase for anyone needing a durable, heat- and fuel-resistant seal in demanding applications; the pack of five offers good value for maintenance routines. It is not the best choice for fluids known to attack fluorocarbon elastomers, but for typical fuel, oil, and high-temperature uses it delivers dependable sealing performance and proven fit in common replacement roles.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this O-ring suitable for fuel system use?\u003c\/strong\u003e\u003cbr\u003eYes, Viton is compatible with many fuels and aromatic and aliphatic hydrocarbons, making this O-ring appropriate for many fuel system seals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat temperature range can this O-ring tolerate?\u003c\/strong\u003e\u003cbr\u003eThe O-ring is rated for use from -15 degrees F to 400 degrees F, covering most engine and industrial heat exposures.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill this work with brake fluid?\u003c\/strong\u003e\u003cbr\u003eNo, Viton is vulnerable to glycol-based brake fluids; choose a seal specifically rated for those fluids instead.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48186562445531,"sku":"B000FONNDC","price":79.19,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81iyYJCP7YL._SL1500_a988e54d-1126-4cda-8d9e-ef2c17f3db33.jpg?v=1769594006","url":"https:\/\/gearmusthave.com\/products\/447-viton-o-ring-75a-durometer-9-in-id-durable-chemical-resistant","provider":"GearMustHave","version":"1.0","type":"link"}