{"product_id":"446-viton-o-ring-75a-durometer-8-1-2ft-id-9ft-od-heat-and-fuel","title":"446 Viton O-Ring 75A Durometer 8-1\/2ft ID 9ft OD - Heat and Fuel","description":"\u003cp\u003eIn this review the 446 Viton O-ring is evaluated as a straightforward, workmanlike sealing solution for users who need reliable resistance to heat, fuels and many chemicals. The bottom line: this pack of ten O-rings is best for technicians, hobbyists and maintenance teams that require a durable replacement part that holds vacuum and resists common hydrocarbon fuels. The reviewer found the material and hardness combination gives predictable sealing performance in applications that match Viton compatibility, while noting a few specific chemical limitations to consider.\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, it offers strong resistance to heat, fuels and many solvents that would degrade other rubbers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Usable from -15 degrees F to 400 degrees F, allowing the ring to perform across cold storage to high-heat operating environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e The 75A hardness provides a balance of flexibility and resistance to penetration, helping maintain a seal under compression and repeated cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape and fit:\u003c\/strong\u003e The round cross-section and specified 8-1\/2' ID and 9' OD dimensions make it suitable for cylindrical overlapping surfaces and common replacement tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical compatibility:\u003c\/strong\u003e Compatible with non-flammable hydraulic fuels, silicone oil, many aromatic and aliphatic hydrocarbons, and suitable for high vacuum and ozone exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e Sold as a pack of 10, offering spare parts for multiple maintenance cycles or to keep on hand for field repairs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis O-ring is aimed at professionals and informed DIYers who service fuel systems, hydraulic components, vacuum fittings, or plumbing that encounter hydrocarbons, silicone oils or ozone. It works well as a direct replacement where AS568A standard sizing and a 75A Viton compound are specified, and buyers using items like MSA bottles, specific firearm seals or Silencerco switches will likely find a precise fit.\u003c\/p\u003e\n\u003cp\u003eThose working with low molecular weight organic acids, strong alkalis, amines, ammonia gas, glycol-based brake fluids or super-heated steam should look for alternative elastomers, since Viton is vulnerable to these media. Also, if extreme softness or very low-temperature flexibility below -15 degrees F is required, a different durometer or compound 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\u003eDurable under heat and fuel exposure, providing long-lasting leak resistance in compatible systems.\u003c\/li\u003e\n\u003cli\u003eConsistent 75A hardness gives good sealing without being too stiff for many assemblies.\u003c\/li\u003e\n\u003cli\u003eAS568A standard sizing makes it easy to match to existing grooves and mating parts.\u003c\/li\u003e\n\u003cli\u003ePack of 10 offers good value for routine maintenance 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 certain chemicals such as ammonia, amines, glycol brake fluids and strong alkalis, limiting use in some service environments.\u003c\/li\u003e\n\u003cli\u003e75A may be too firm for applications needing a softer, more conforming seal at very low temperatures.\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\u003eHardness\u003c\/td\u003e\n\u003ctd\u003e75A Shore durometer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner diameter\u003c\/td\u003e\n\u003ctd\u003e8-1\/2' (in)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter diameter\u003c\/td\u003e\n\u003ctd\u003e9' (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\u003eStandards\u003c\/td\u003e\n\u003ctd\u003eMeets Aerospace Standard AS568A sizing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 446 Viton O-ring is a practical, cost-effective choice for anyone needing a fuel- and heat-resistant seal in common cylindrical assemblies; its 75A hardness and AS568A sizing make it a reliable replacement for many industrial and consumer applications. Buyers who work with incompatible chemicals or need softer low-temperature performance should choose a different compound, but for fuel systems, vacuum fittings and general maintenance this pack represents good value and dependable service.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eCan this O-ring be used with gasoline and propane?\u003c\/strong\u003e\u003cbr\u003eYes, Viton is compatible with many fuels including aromatic and aliphatic hydrocarbons such as gasoline and propane, making it suitable for fuel system seals within its temperature limits.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill these O-rings withstand high operating temperatures?\u003c\/strong\u003e\u003cbr\u003eYes, the compound is rated for use up to 400 degrees F, so it handles many high-heat applications where Viton is specified.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eAre there media this Viton compound should avoid?\u003c\/strong\u003e\u003cbr\u003eIt should not be used with low molecular organic acids, ammonia gas, alkalis, amines, glycol-based brake fluids or super-heated steam, as these can degrade the material.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48188166504667,"sku":"B000FOLP1Y","price":152.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81iyYJCP7YL._SL1500_711edf72-42bd-430a-9fe2-da206484abc0.jpg?v=1769520822","url":"https:\/\/gearmusthave.com\/products\/446-viton-o-ring-75a-durometer-8-1-2ft-id-9ft-od-heat-and-fuel","provider":"GearMustHave","version":"1.0","type":"link"}