{"product_id":"mr-o-ring-341-viton-o-ring-90a-durometer-pack-of-10","title":"Mr O-Ring 341 Viton O-Ring 90A Durometer - Pack of 10","description":"\u003cp\u003eIn this review the Mr O-Ring 341 Viton O-Ring is assessed for workshop and industrial sealing needs; it is aimed at technicians, mechanics, and maintenance buyers who need a durable, heat-resistant sealing solution. The bottom line: this 90A durometer Viton o-ring delivers reliable chemical and temperature resistance that performs well in petroleum, fuel blends, mineral oils and many solvents, making it a practical choice when longevity and compatibility matter most.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Viton (FKM) offers excellent resistance to high temperature, ozone and weather for longer service life in harsh environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e The 90A hardness provides a firmer seal that resists extrusion and deformation under pressure compared with softer compounds.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize accuracy:\u003c\/strong\u003e Nominal and actual dimensions are provided so users can match fittings precisely for dependable sealing without guesswork.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical compatibility:\u003c\/strong\u003e Performs well with petroleum products, fuels blended with methanol or ethanol, diesel and biodiesel blends, and many oils and greases.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -26C (-15F) to 232C (450F) so it is suited to both low-temperature and very high-temperature applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e Supplied as a pack of 10 so small maintenance shops and field technicians can replace multiple seals without frequent reordering.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe 341 Viton o-ring is best for professional users who need a compact, high-temperature resistant seal for hydraulic, fuel system or industrial equipment where compatibility with hydrocarbons and solvents is critical. It is also suitable for laboratory or vacuum applications that require reliable sealing under heat and chemical exposure.\u003c\/p\u003e\u003cp\u003eIt is less appropriate for users who need a very soft, low-durometer seal for delicate applications or for systems that require FDA food-grade elastomers; those buyers should look for lower durometer or food-compatible materials.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eExcellent chemical and high-temperature resistance from the Viton (FKM) compound.\u003c\/li\u003e\n\u003cli\u003eAccurate nominal and measured dimensions reduce installation uncertainty and leakage risk.\u003c\/li\u003e\n\u003cli\u003e90A hardness resists extrusion and maintains shape in demanding service conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eHigher durometer means it may not seal as well in low-compression or very small-gap applications compared with softer o-rings.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eMr O-Ring\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eViton (FKM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDurometer\u003c\/td\u003e\n\u003ctd\u003e90A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal Size\u003c\/td\u003e\n\u003ctd\u003e3-1\/2 in ID, 3-7\/8 in OD, 3\/16 in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual Size\u003c\/td\u003e\n\u003ctd\u003e3.475 in ID, 3.895 in OD, 0.210 in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric Size\u003c\/td\u003e\n\u003ctd\u003e88.27 mm ID, 98.93 mm OD, 5.33 mm CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-26C (-15F) to 232C (450F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Mr O-Ring 341 Viton o-ring is a solid, economical choice for maintenance and industrial sealing when chemical resistance and high temperature performance matter. Buyers who need a firmer, long-lived seal for petroleum, fuel blends and many solvents will find good value in this pack of 10; those needing softer, food-grade elastomers should consider alternatives.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this o-ring compatible with diesel and biodiesel blends?\u003c\/strong\u003e\u003cbr\u003eYes, the Viton compound is formulated to perform well with diesel and biodiesel blends as noted in the compatibility information.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is the usable temperature range for this o-ring?\u003c\/strong\u003e\u003cbr\u003eThe specified temperature range is -26C (-15F) up to 232C (450F), suitable for many high-temperature applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eAre the actual dimensions different from the nominal dimensions?\u003c\/strong\u003e\u003cbr\u003eYes; the listing provides both nominal and measured sizes so installers can confirm fit: actual ID 3.475 in, OD 3.895 in, CS 0.210 in.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48613342019803,"sku":"B07R62S2Z9","price":54.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_6b796e8d-1a1a-40b0-9aff-19b7ecdaf795.jpg?v=1778570228","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-341-viton-o-ring-90a-durometer-pack-of-10","provider":"GearMustHave","version":"1.0","type":"link"}