{"product_id":"364-viton-o-ring-75a-durometer-6-3-4-in-id-pack-of-5","title":"364 Viton O-Ring 75A Durometer, 6-3\/4 in ID - Pack of 5","description":"\u003cp\u003eIn this review the 364 Viton O-ring (pack of 5) is evaluated for mechanics, hobbyists, and maintenance techs who need a dependable seal that resists fuels, heat, and many chemicals. The bottom line: this is a practical replacement O-ring when compatibility with hydrocarbon fuels and high temperatures matters most, because its fluorocarbon construction and 75A hardness deliver durable sealing over a broad temperature range while fitting common cylindrical overlaps precisely.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Made of Viton fluorocarbon elastomer for superior resistance to fuels, aromatic and aliphatic hydrocarbons, and many chemicals, reducing seal failure 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, allowing use in both cold-start and high-heat applications without rapid degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e 75A hardness provides a balance of flexibility and puncture resistance for durable sealing under compression and repeated use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape and fit:\u003c\/strong\u003e Round cross-section and specified dimensions ensure a tight seal between overlapping cylindrical surfaces and straightforward replacement in compatible parts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e Manufactured to meet Aerospace Standard AS568A sizing conventions, so it is easy to match to existing AS568A-based O-ring grooves.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis pack is aimed at technicians, gun owners replacing barrel seals, and equipment maintainers who need an O-ring that handles fuel, silicone oil, and harsh solvents while resisting heat and ozone. It is particularly useful as replacement parts for fuel bottles, hydraulic fittings, and applications exposed to aromatic or aliphatic hydrocarbons.\u003c\/p\u003e\u003cp\u003ePeople who routinely need seals for glycol brake fluids, strong alkalis, ammonia gas, or super-heated steam should look elsewhere, since Viton is vulnerable to those specific chemistries. Also, if a softer or harder shore durometer is required for a particular groove fit, select a different hardness grade.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExcellent chemical and fuel resistance, making it suitable for many engine and hydraulic uses.\u003c\/li\u003e\n\u003cli\u003eWide operating temperature span for reliable performance from cold conditions up to high heat.\u003c\/li\u003e\n\u003cli\u003eCustomers report good fit and leak resistance in common replacements, indicating reliable sizing and function.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eNot compatible with glycol-based brake fluids, strong alkalis, and some low molecular weight organic acids, limiting use in those systems.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\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\u003e6-3\/4 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e7-1\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e3\/16 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\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe 364 Viton O-ring pack is a sensible buy for anyone needing a heat- and fuel-resistant replacement seal that holds up in demanding conditions. Given its 75A hardness, AS568A sizing compatibility, and proven leak resistance in customer reports, it represents strong value for repair and maintenance tasks where Viton compatibility is required.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this O-ring suitable for fuel systems?\u003c\/strong\u003e\u003cbr\u003eYes, Viton is compatible with many fuels and aromatic or aliphatic hydrocarbons, making it suitable for many fuel system seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat temperatures can it handle?\u003c\/strong\u003e\u003cbr\u003eThe material is rated for service from -15 degrees F up to 400 degrees F.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill it resist brake fluid and ammonia?\u003c\/strong\u003e\u003cbr\u003eNo, Viton is vulnerable to glycol-based brake fluids, ammonia gas, and strong alkalis, so avoid those fluids.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48675284779227,"sku":"B000FOLPVY","price":42.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81iyYJCP7YL._SL1500_86525001-8e30-47ac-bd4c-f47a9cde37bb.jpg?v=1778627507","url":"https:\/\/gearmusthave.com\/products\/364-viton-o-ring-75a-durometer-6-3-4-in-id-pack-of-5","provider":"GearMustHave","version":"1.0","type":"link"}