{"product_id":"m4x50-viton-o-ring-75a-durometer-50-mm-id-reliable-chemical-seal","title":"M4x50 Viton O-Ring 75A Durometer, 50 mm ID - Reliable Chemical Seal","description":"\u003cp\u003eIn this review the M4x50 Viton O-Ring proves itself as a straightforward, workmanlike sealing part for users who need chemical and heat resistance in a small package. The bottom line: this pack of 25 O-rings is aimed at technicians, hobbyists, and mechanics who require a consistent, durable seal for threaded barrels, carburetor seats, and similar cylindrical joints; the single biggest reason to buy is the Viton compound's wide chemical compatibility and high temperature capability that keeps threads and seals protected in demanding environments.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Made from Viton fluorocarbon elastomer, the material offers strong resistance to fuels, oils, and many solvents used in mechanical systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e The 75A durometer provides a balance of flexibility and firmness so the ring compresses for a good seal yet resists extrusion under pressure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e With a 50 mm inner diameter and 58 mm outer diameter, this O-ring fits many metric threaded barrels and seal grooves without trimming.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated for a wide service window, the compound works across a broad span of temperatures suitable for high-heat and cold applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-section:\u003c\/strong\u003e The round cross-section is designed to form an even seal between overlapping cylindrical surfaces and retain thread protectors reliably.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e Supplied as a pack of 25, the set provides spare rings for maintenance and reduces downtime when replacements are needed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis O-ring is best for maintenance professionals, motorsport mechanics, and DIYers who service threaded barrels, carburetor seats, or hydraulic fittings that encounter fuels, oils, or aromatic hydrocarbons. Customers who need a reliable thread protector for Springfield-type barrels or a replacement seal for a DRZ 400 carburetor will find the dimensions and compound appropriate.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include applications exposed to strong bases, ammonia gas, or super-heated steam where Viton is vulnerable, and any situation that requires a softer seal than 75A durometer offers. Also, if a non-metric or non-round cross-section is required, choose a different part.\u003c\/p\u003e\n\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 to fuels and many solvents, making it useful across service garages and industrial settings.\u003c\/li\u003e\n\u003cli\u003e75A hardness balances sealing capability with durability, holding thread protectors in place as reported by users.\u003c\/li\u003e\n\u003cli\u003eAccurate 50 mm ID sizing fits common threaded barrels and carburetor seats without modification.\u003c\/li\u003e\n\u003cli\u003ePack of 25 offers value and ready spares for routine maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eViton is vulnerable to certain chemicals such as amines, strong alkalis, and glycol-based brake fluids, so compatibility checks are required for those fluids.\u003c\/li\u003e\n\u003cli\u003eThe 75A hardness may be firmer than needed for delicate, low-pressure sealing where a softer elastomer would seal better.\u003c\/li\u003e\n\u003c\/ul\u003e\n\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\u003e58 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e4 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack Quantity\u003c\/td\u003e\n\u003ctd\u003e25 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eFor anyone needing a dependable, chemical-resistant O-ring for threaded barrels, carburetor seats, or seal repairs, this 50 mm Viton ring is a sensible buy because of its material toughness and correct sizing; the pack of 25 adds practical value for routine maintenance. Avoid it only if your fluid exposure includes known Viton incompatibilities or you require a much softer seal.\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eWill this fit Springfield threaded barrels?\u003c\/strong\u003e\u003cbr\u003eYes, customers report the 50 mm ID works well with Springfield echelon and some 10mm auto Springfield threaded barrels for thread protection.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat temperature range can it handle?\u003c\/strong\u003e\u003cbr\u003eThe Viton compound is rated for a wide service window, suitable for high-heat and cold applications within the specified range.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs Viton compatible with brake fluids?\u003c\/strong\u003e\u003cbr\u003eViton is vulnerable to glycol-based brake fluids and some amines and strong alkalis, so compatibility should be verified before use.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48719101460699,"sku":"B00NQXMNLW","price":102.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/611g_BwDJoL._SL1500_00463272-7843-466a-9bad-cce7afeaac56.jpg?v=1778881405","url":"https:\/\/gearmusthave.com\/products\/m4x50-viton-o-ring-75a-durometer-50-mm-id-reliable-chemical-seal","provider":"GearMustHave","version":"1.0","type":"link"}