{"product_id":"m2x50-viton-o-ring-75a-50-mm-id-54-mm-od-durable-metric-seal","title":"M2x50 Viton O-Ring 75A, 50 mm ID 54 mm OD - Durable Metric Seal","description":"\u003cp\u003eIn this review the M2x50 Viton O-Ring is assessed for technicians, mechanics, and hobbyists who need a reliable metric seal. The bottom line: this pack of 50 Viton O-rings is best for flange and cylindrical sealing applications where chemical and heat resistance matter. The reviewer found the O-ring's \u003cstrong\u003eViton construction\u003c\/strong\u003e and 75A hardness deliver consistent sealing for threaded barrels, carburetor seat seals, and general purpose engineering use without brittle failure across typical service temperatures.\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 strong resistance to fuels, oils, and many chemicals for longer life in aggressive environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e 75A hardness provides a balance of flexibility and resilience that maintains a reliable seal under compression without extruding easily.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated to withstand a broad service range so it can operate in moderately cold to high-heat applications common in engines and industrial equipment.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm factor:\u003c\/strong\u003e Round cross-section creates a dependable seal between overlapping cylindrical surfaces and threaded protectors to keep contaminants out.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e Supplied in a 50-count pack which is convenient for maintenance shops or repeated replacements to reduce downtime.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis O-ring is aimed at professionals and DIYers who work with hydraulic fittings, fuel systems, or threaded barrels where chemical resistance and heat tolerance are required. It suits motorcycle carburetor repairs, machinery maintenance, and applications like Springfield echelon threaded barrels where customers reported a good fit and functionality.\u003c\/p\u003e\n\u003cp\u003eThose who need seals resistant to strong alkalis, ammonia gas, or glycol-based brake fluids should look elsewhere, as Viton is vulnerable to those substances. If you require an elastomer rated for extreme cold below the listed range or highly acidic conditions, choose a material specified for those environments.\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 many automotive and industrial fluids, improving longevity of seals.\u003c\/li\u003e\n\u003cli\u003e75A hardness balances durability and flexibility, delivering consistent sealing performance in threaded and cylindrical joints.\u003c\/li\u003e\n\u003cli\u003ePack of 50 offers good value for maintenance tasks and repeated replacements.\u003c\/li\u003e\n\u003cli\u003eCustomers report reliable fit and effectiveness at keeping thread protectors and carburetor seats sealed.\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 low molecular organic acids, ammonia, some alkalis and glycol-based brake fluids, limiting use in certain chemical environments.\u003c\/li\u003e\n\u003cli\u003eTemperature limits mean it is not suitable for continuous exposure to super-heated steam or environments below the lower rating for prolonged periods.\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\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner diameter (ID)\u003c\/td\u003e\n\u003ctd\u003e50 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e54 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e2 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e50 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe M2x50 Viton O-Ring is a practical, cost-effective choice for users needing a chemically resistant metric seal with dependable heat tolerance. It is especially good value for maintenance shops and owners of threaded-barrel equipment who require consistent sealing and replacement spares; avoid it only when exposure to incompatible chemicals or extreme steam conditions is expected.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these O-rings suitable for fuel systems?\u003c\/strong\u003e\u003cbr\u003eYes, Viton is resistant to many fuels and aromatic hydrocarbons, making these O-rings appropriate for many fuel system applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the 75A hardness work for threaded barrel protectors?\u003c\/strong\u003e\u003cbr\u003eThe 75A durometer offers enough stiffness to hold thread protectors in place while remaining flexible enough to seal across threads, matching customer feedback on fit and function.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat chemicals should be avoided?\u003c\/strong\u003e\u003cbr\u003eAvoid prolonged exposure to low molecular organic acids, ammonia gas, strong alkalis, amines, and glycol-based brake fluids, where Viton performance degrades.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48258597454043,"sku":"B00NR0L4A0","price":83.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/611g_BwDJoL._SL1500_fb1f215e-71fe-4b5e-8384-ee43874d302c.jpg?v=1778316065","url":"https:\/\/gearmusthave.com\/products\/m2x50-viton-o-ring-75a-50-mm-id-54-mm-od-durable-metric-seal","provider":"GearMustHave","version":"1.0","type":"link"}