{"product_id":"445-viton-o-ring-75a-durometer-8in-id-8-1-2in-od-pack-of-5-durable","title":"445 Viton O-Ring 75A Durometer 8in ID 8-1\/2in OD Pack of 5 - Durable","description":"\u003cp\u003eOur review of the 445 Viton O-ring pack explains who should consider these parts and why they stand out for demanding sealing jobs. These black, round O-rings are made from Viton (fluorocarbon elastomer) and the single biggest reason to buy is their broad chemical and temperature resistance, which makes them suitable for fuel, hydraulic, and high-heat applications where other elastomers fail. The pack of five and the 75A shore hardness make them a practical choice for repairs and replacements where durability and a precise fit matter.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Viton construction gives reliable resistance to fuels, aromatic and aliphatic hydrocarbons, and many chemicals encountered in industrial and automotive use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -15 degrees F to 400 degrees F, allowing use in both cold storage and high-heat engine or exhaust environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e 75A hardness resists penetration and extrusion while still providing a flexible seal for cylinders and overlapping surfaces.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize and fit:\u003c\/strong\u003e 8in inner diameter with an 8-1\/2in outer diameter and 1\/4in width matches AS568A 445 dimensions for common replacement needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e Five O-rings per pack offers spare parts for multiple devices or repeat maintenance tasks, improving value for money.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe 445 Viton O-ring pack is aimed at technicians, hobbyists, and maintenance staff who need a resilient seal for fuel systems, hydraulic fittings, suppressors, or other cylindrical joins where exposure to heat, fuels, and many chemicals is expected. Its compatibility with non-flammable hydraulic fuels, silicone oils, and many hydrocarbons makes it useful in automotive, industrial, and outdoor equipment applications.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users needing compatibility with glycol-based brake fluids, strong alkalis, or ammonia gas, and anyone whose application involves sustained exposure to super-heated steam or low molecular weight organic acids, since Viton is vulnerable to those media.\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 for a wide range of service environments.\u003c\/li\u003e\n\u003cli\u003eWide usable temperature window from -15 degrees F to 400 degrees F for versatile applications.\u003c\/li\u003e\n\u003cli\u003e75A hardness provides a balance of durability and sealing performance in cylindrical assemblies.\u003c\/li\u003e\n\u003cli\u003ePack of five provides spare parts and good value for common repair tasks.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot suitable for applications exposed to ammonia, strong alkalis, glycol-based brake fluids, or super-heated steam.\u003c\/li\u003e\n\u003cli\u003eViton can be more expensive than general-purpose elastomers for low-demand seals.\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\u003eInner Diameter\u003c\/td\u003e\n\u003ctd\u003e8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e8-1\/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\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\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 445 Viton O-ring pack is a sensible buy for anyone needing a durable, heat- and fuel-resistant seal in cylindrical assemblies. It offers dependable material performance and a practical pack size for repairs, making it good value for users who require chemical compatibility and high-temperature service; avoid it only where incompatible fluids or extreme steam exposure are present.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these O-rings suitable for fuel system use?\u003c\/strong\u003e\u003cbr\u003eYes, the Viton material is compatible with many fuels, aromatic and aliphatic hydrocarbons, and is commonly used in fuel pump and related applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo they meet standard O-ring sizes?\u003c\/strong\u003e\u003cbr\u003eYes, these follow the AS568A 445 profile and the listed 8 in ID, 8-1\/2 in OD, 1\/4 in width dimensions for replacement use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan they be used in very low temperature environments?\u003c\/strong\u003e\u003cbr\u003eThey are rated down to -15 degrees F, which is acceptable for many cold-weather applications but may not suit extreme cryogenic service.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48665029017819,"sku":"B000FOI18Y","price":75.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81iyYJCP7YL._SL1500_7be8bd54-20c2-426b-901f-15cd2098c555.jpg?v=1778642076","url":"https:\/\/gearmusthave.com\/products\/445-viton-o-ring-75a-durometer-8in-id-8-1-2in-od-pack-of-5-durable","provider":"GearMustHave","version":"1.0","type":"link"}