{"product_id":"m5x75-viton-o-ring-75a-durometer-75-mm-id-durable-seal","title":"M5x75 Viton O-Ring 75A Durometer, 75 mm ID - Durable Seal","description":"\u003cp\u003eIn this review the M5x75 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 O-rings stands out for its material choice and temperature range, offering a practical solution when compatibility with non-flammable hydraulic fuels, silicone oil, and many hydrocarbons is the priority. It is particularly useful where a firm 75A hardness and a 75 mm inner diameter are required to maintain a durable seal under varied operating conditions.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Made of black Viton fluorocarbon elastomer, it offers superior resistance to oils, fuels, and many industrial chemicals compared with general-purpose elastomers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e The 75A hardness balances flexibility and compression set resistance so the O-ring holds a consistent seal without being overly stiff.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated for a wide operating range, it remains functional from low temperatures up to high heat, making it suitable for varied environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-section:\u003c\/strong\u003e The round profile provides a dependable seal between cylindrical overlapping surfaces, ideal for threaded barrels and circular fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Works with non-flammable hydraulic fuels, silicone oil, aromatic and aliphatic hydrocarbons, and is suitable for high vacuum applications where chemical stability matters.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis O-ring is best for users who need a chemical- and heat-resistant seal in industrial, automotive, or motorcycle applications, such as sealing threaded barrel protectors, carburetor seat seals, or hydraulic fittings. It also suits maintenance shops and fabricators who require consistent dimensions and a mid-range hardness.\u003c\/p\u003e\n\u003cp\u003eUsers who should look elsewhere include those needing compatibility with strong alkalis, ammonia gas, or glycol-based brake fluids, and anyone requiring extreme low-temperature elastomers beyond the stated range; alternative elastomers are preferable in those cases.\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 resistance from the Viton compound provides durability in fuel- and oil-exposed applications.\u003c\/li\u003e\n\u003cli\u003e75A durometer offers a practical balance of flexibility and sealing force for threaded and cylindrical interfaces.\u003c\/li\u003e\n\u003cli\u003ePositive customer feedback highlights reliable fit, seal quality, and value for money for common uses like Springfield threaded barrels and carburetor seats.\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, strong alkalis, and glycol-based brake fluids, limiting use in some specialized systems.\u003c\/li\u003e\n\u003cli\u003eThe stated high-end temperature rating varies in descriptions; confirm your application's maximum service temperature 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\u003eDurometer\u003c\/td\u003e\n\u003ctd\u003e75A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eShape\u003c\/td\u003e\n\u003ctd\u003eRound cross-section O-ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner diameter (ID)\u003c\/td\u003e\n\u003ctd\u003e75 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e85 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth \/ Cross-section\u003c\/td\u003e\n\u003ctd\u003e5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e-15 degrees F (-26 degrees C) to 400 degrees F (205 degrees C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe M5x75 Viton O-Ring is a sensible buy for those needing a mid-hardness, chemically resistant seal in industrial or automotive contexts; the pack of ten and reliable sizing deliver good value. Avoid it only when exposure to incompatible chemicals or extreme temperature endpoints rules out fluorocarbon elastomers.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eIs this O-ring suitable for gasoline and hydraulic fluids?\u003c\/strong\u003e\u003cbr\u003eYes; Viton is compatible with many fuels and non-flammable hydraulic fluids listed, making it suitable for such uses.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the 75A hardness be too stiff for small precision fittings?\u003c\/strong\u003e\u003cbr\u003eNot usually; 75A provides a balance of flexibility and seal force, but very delicate fittings may prefer a softer elastomer.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow many O-rings are included?\u003c\/strong\u003e\u003cbr\u003eThis product is sold as a pack of ten O-rings.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48184234967259,"sku":"B00NQXGREG","price":86.89,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71lVOM9LZJL._SL1500_3c15085c-bcff-400c-bc25-156fd53f6ccd.jpg?v=1769619185","url":"https:\/\/gearmusthave.com\/products\/m5x75-viton-o-ring-75a-durometer-75-mm-id-durable-seal","provider":"GearMustHave","version":"1.0","type":"link"}