{"product_id":"244-viton-o-ring-75a-durometer-4-1-4-in-id-4-1-2-in-od-reliable-seal","title":"244 Viton O-Ring 75A Durometer 4-1\/4 in ID 4-1\/2 in OD - Reliable Seal","description":"\u003cp\u003eIn this review the 244 Viton O-Ring is presented for technicians, maintenance crews, and hobbyists who need a durable replacement seal. The bottom line: it is best for applications that require chemical and heat resistance because its fluorocarbon compound and 75A hardness combine to resist fuels, oils, ozone and high temperatures while providing a tight seal. The reviewer found these O-rings to be straightforward replacements for common cylindrical overlaps and praised their consistent sizing and leak resistance in real-world use.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Viton fluorocarbon elastomer delivers strong resistance to fuels, aromatic and aliphatic hydrocarbons and many chemicals so seals last longer in aggressive environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -15 degrees F to 400 degrees F so the O-ring can be used in both cold startup and sustained high-heat applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e 75A hardness provides a balance of flexibility and resistance to penetration for reliable sealing under compression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape and fit:\u003c\/strong\u003e The round cross-section is designed to form a reliable seal between cylindrical overlapping surfaces, making it suitable as a direct replacement for common hardware and bottle seals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e Conformance to Aerospace Standard AS568A means sizing follows widely used specifications for interchangeability and predictable performance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe 244 Viton O-Ring is aimed at industrial and field technicians, firearm and suppressor owners replacing barrel and switch seals, hydraulic system maintainers, and anyone needing a fuel- and chemical-resistant seal in pumps or fittings. Customers replacing MSA fuel bottle seals or Remington 1100 barrel seals will find the size and hardness appropriate for those tasks.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include applications that expose seals to concentrated low molecular weight organic acids, strong alkalis, ammonia gas, or glycol-based brake fluids, and systems requiring resistance to super-heated steam; in those cases a different elastomer or specialty material is advisable.\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 heat and fuel resistance from the fluorocarbon compound, which customers noted held up under elevated temperatures.\u003c\/li\u003e\n\u003cli\u003eConsistent sizing that fits common replacement needs and reduces leakage in assemblies noted by users.\u003c\/li\u003e\n\u003cli\u003eGood value in the pack quantity for routine maintenance and multiple repairs.\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 like low molecular organic acids, amines, and glycol-based brake fluids, so chemical compatibility must be checked before use.\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 (ID)\u003c\/td\u003e\n\u003ctd\u003e4-1\/4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e4-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCross-section width\u003c\/td\u003e\n\u003ctd\u003e1\/8 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 244 Viton O-Ring is a practical and cost-effective choice for users who need a chemically and thermally robust seal for fuel systems, hydraulic fittings, and common cylindrical joints. Its 75A hardness and AS568A sizing make it a dependable replacement option, offering solid value for routine maintenance while requiring care in environments with incompatible chemicals.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this O-ring suitable for fuel applications?\u003c\/strong\u003e\u003cbr\u003eYes. The Viton material is compatible with many fuels and aromatic and aliphatic hydrocarbons, making it suitable for non-flammable hydraulic fuels and similar uses.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat temperatures can this O-ring handle?\u003c\/strong\u003e\u003cbr\u003eThe material is rated for use from -15 degrees F up to 400 degrees F, suitable for most cold and high-heat sealing tasks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it fit standard AS568A grooves?\u003c\/strong\u003e\u003cbr\u003eYes. The ring meets AS568A sizing conventions so it is intended to match common groove dimensions for the listed ID and cross-section.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48636988752091,"sku":"B000FMUWTM","price":62.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81iyYJCP7YL._SL1500_c5e93247-7b85-490e-8d5f-5f702296daae.jpg?v=1778602478","url":"https:\/\/gearmusthave.com\/products\/244-viton-o-ring-75a-durometer-4-1-4-in-id-4-1-2-in-od-reliable-seal","provider":"GearMustHave","version":"1.0","type":"link"}