{"product_id":"m3x195-viton-o-ring-75a-durometer-195-mm-id-durable-seal","title":"M3x195 Viton O-Ring 75A Durometer, 195 mm ID - Durable Seal","description":"\u003cp\u003eIn this review the M3x195 Viton O-Ring is evaluated for technicians, mechanics, and hobbyists who need a reliable metric seal that resists fuels and many chemicals. The bottom line: this pack of ten black Viton O-rings is worth considering when compatibility with non-flammable hydraulic fluids, silicone oil, and aromatic hydrocarbons matters most, because the fluorocarbon elastomer construction and 75A durometer deliver a balance of flexibility and resilience across a wide working temperature range.\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, providing broad chemical and fuel resistance for industrial and automotive uses.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e The 75A hardness gives a firm but elastic seal that holds shape under compression while still conforming to mating surfaces.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated for extreme conditions, the material works from cold to high heat, making it suitable for many operating environments.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eRound cross-section:\u003c\/strong\u003e A classic round profile creates a reliable seal between overlapping cylindrical surfaces such as threaded barrels and fittings.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e Supplied as a pack of ten, so there are spares for maintenance, spares, or multiple installations without repeated ordering.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe M3x195 Viton O-Ring is best for users who need a small batch of metric seals compatible with fuels, oils, and many solvents - think mechanics servicing carburetors, firearm owners using threaded barrels that require thread protector retention, and technicians working on hydraulic fittings. It is particularly useful where a 195 mm inner diameter and a 3 mm cross-section match existing parts.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users requiring resistance to ammonia, strong alkalis, or glycol-based brake fluids, and anyone needing a softer or much harder compound than 75A for specialized sealing tasks. For silicone-free or steam-heavy systems, verify chemical compatibility before choosing this Viton grade.\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\u003eGood chemical and fuel resistance thanks to the Viton compound, suitable for many industrial fluids.\u003c\/li\u003e\n \u003cli\u003eFirm 75A durometer offers reliable sealing and maintains position on threaded components as reported by users.\u003c\/li\u003e\n \u003cli\u003eWorks across a wide temperature span, so it performs in both cold and high-heat situations.\u003c\/li\u003e\n \u003cli\u003ePack of ten provides value and convenience for maintenance and 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 chemically compatible with certain substances like low molecular organic acids, ammonia gas, and glycol-based brake fluids; check compatibility for those fluids.\u003c\/li\u003e\n \u003cli\u003eThe 3 mm cross-section may be too thin for applications requiring a thicker sealing surface.\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\u003eDurometer\u003c\/td\u003e\n\u003ctd\u003e75A\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eCross-section\u003c\/td\u003e\n\u003ctd\u003eRound, 3 mm width\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eInner diameter (ID)\u003c\/td\u003e\n\u003ctd\u003e195 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eOuter diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e201 mm\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\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003ePack of 10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe M3x195 Viton O-Ring is a practical, cost-effective option for general-purpose sealing where resistance to fuels and many chemicals is required. It suits maintenance work on threaded barrels and fittings and offers good longevity across temperature extremes; choose it when a medium-hard 75A Viton seal matches the application and chemical compatibility checks out.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this O-ring compatible with gasoline and hydraulic oils?\u003c\/strong\u003e\u003cbr\u003eYes, Viton is compatible with many fuels and non-flammable hydraulic oils, making this O-ring suitable for those fluids.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill it hold thread protectors on firearm barrels?\u003c\/strong\u003e\u003cbr\u003eCustomers report the fit works well on threaded barrels such as certain 10 mm Springfield barrels, so it is effective at retaining thread protectors when the dimensions match.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it be used with steam or ammonia?\u003c\/strong\u003e\u003cbr\u003eNo, Viton is vulnerable to ammonia gas and super-heated steam; avoid use with those media.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48204907020507,"sku":"B00NQXXJVU","price":135.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71lVOM9LZJL._SL1500_0c2e3572-60ca-4dfb-bc2b-bff3f67ba088.jpg?v=1770232238","url":"https:\/\/gearmusthave.com\/products\/m3x195-viton-o-ring-75a-durometer-195-mm-id-durable-seal","provider":"GearMustHave","version":"1.0","type":"link"}