{"product_id":"m7x137-viton-o-ring-75a-durometer-137mm-id-reliable-seal","title":"M7x137 Viton O-Ring 75A Durometer, 137mm ID - Reliable Seal","description":"\u003cp\u003eIn this review the M7x137 Viton O-Ring is judged as a practical, purpose-driven seal for mechanical and hydraulic applications where chemical and heat resistance matter. It is best for technicians, hobbyists, and equipment maintainers who need a dependable replacement O-ring in a known size; the single biggest reason to buy is the material choice - Viton fluorocarbon - which offers broad chemical compatibility and high temperature tolerance that many standard elastomers cannot match.\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) so it resists fuels, oils and many chemicals that degrade other rubbers.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e The 75A durometer provides a firm but flexible seal that balances compressibility and wear resistance for dynamic and static joints.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated for use across a wide range of temperatures, allowing the O-ring to perform from low temperatures up to high-heat engine or industrial environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-section:\u003c\/strong\u003e The round cross-section forms an effective seal between cylindrical overlapping surfaces for shafts, barrels, or housings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize consistency:\u003c\/strong\u003e The 137 mm inner diameter and 151 mm outer diameter with 7 mm width mean this pack fits applications that require those metric dimensions without modification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e Sold as a pack of 5, which provides spare parts for routine maintenance or multiple installations.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis O-ring is aimed at users who need a chemically resistant seal for industrial, automotive, or small-engine tasks, including replacing seals on threaded barrels and carburetor seats where fit and seal quality matter. It appeals to maintenance techs and DIY mechanics who value a proven material like Viton for reliability under fuel and oil exposure.\u003c\/p\u003e\n\u003cp\u003eIt is less appropriate for applications exposed to strong bases, ammonia gas, or super-heated steam, where compatibility issues are known. Also consider alternative elastomers if extreme low-temperature flexibility below -15 degrees F is a requirement.\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 provided by the Viton compound for long-term sealing in contaminated environments.\u003c\/li\u003e\n\u003cli\u003eGood balance of firmness and compliance with the 75A durometer, helping maintain a reliable seal under pressure.\u003c\/li\u003e\n\u003cli\u003eSize and fit praised by customers for specific threaded barrels and carburetor seat seals, indicating dependable real-world performance.\u003c\/li\u003e\n\u003cli\u003ePack of 5 gives value and spares for maintenance cycles.\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 substances such as ammonia gas, strong alkalis, and some organic acids, so users must confirm chemical compatibility for their system.\u003c\/li\u003e\n\u003cli\u003eThe temperature range noted in the description contains slightly different upper limits in different lines, so verify the required maximum for your application.\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\u003e137 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e151 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e7 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 400-450 degrees F (205-232 degrees C)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe M7x137 Viton O-Ring is a solid, cost-effective choice for anyone needing a reliable metric seal that resists fuels and many chemicals; its Viton construction and 75A hardness deliver dependable performance for threaded barrels, carburetor seats, and similar applications, and the 5-pack makes it good value for maintenance or repairs.\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 non-flammable hydraulic fuels, many oils and aromatic and aliphatic hydrocarbons, making it suitable for those fluids.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat temperatures can this O-ring handle?\u003c\/strong\u003e\u003cbr\u003eThe listed operational range covers low temperatures to high heat environments, roughly -15 degrees F (-26 degrees C) up to about 400-450 degrees F (205-232 degrees C); confirm the exact upper limit needed for your system.\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 5, providing spares for multiple installations or future maintenance.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48231625621723,"sku":"B00NQVR0WQ","price":150.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/611g_BwDJoL._SL1500_da532c76-c4e0-4b1d-948c-769530eb6a49.jpg?v=1770716346","url":"https:\/\/gearmusthave.com\/products\/m7x137-viton-o-ring-75a-durometer-137mm-id-reliable-seal","provider":"GearMustHave","version":"1.0","type":"link"}