{"product_id":"233-viton-o-ring-90a-durometer-2-7-8-in-id-pack-of-25","title":"233 Viton O-Ring 90A Durometer, 2-7\/8 in ID - Pack of 25","description":"\u003cp\u003eIn this review the reviewer evaluates the Mr O-Ring 233 Viton O-ring pack and finds it best suited for technicians and maintenance professionals who need reliable chemical and high-temperature sealing. The bottom line: these 90A durometer Viton rings combine a wide usable temperature range and strong resistance to fuels and oils, making them a solid choice for demanding sealing tasks. The pack of 25 provides parts room or job-site spares, and the review focuses on durability, dimensional accuracy and material performance in petroleum and high-temperature environments.\u003c\/p\u003e\n\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Fluorocarbon rubber (Viton\/FKM) offers excellent resistance to fuels, oils, aromatics and many organic solvents which reduces seal failures in chemical exposure.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e 90A hardness provides a firm cross-section that holds shape under compression and is suitable where a stiffer seal is preferred.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -26C to 232C (-15F to 450F), allowing use in high-temperature engine, industrial and process applications without rapid degradation.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eSize accuracy:\u003c\/strong\u003e Nominal and actual dimensions are provided (2-7\/8 in ID nominal, actual 2.859 in ID) which helps installers choose compatible shafts and grooves with confidence.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003ePack quantity:\u003c\/strong\u003e Twenty-five rings in black supply spares for multiple repairs or for keeping a stock of commonly used sizes on hand.\u003c\/li\u003e\n \u003cli\u003e\n\u003cstrong\u003eVersatility:\u003c\/strong\u003e Performs well with petroleum products, diesel blends, mineral and silicone oils, and holds up to ozone, weather and high vacuum conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis product is aimed at professional mechanics, maintenance technicians and industrial users who need a robust sealing material resistant to fuels, oils and high temperatures. The 90A hardness makes these O-rings appropriate for static and some dynamic seals where a firmer profile is required and where chemical exposure is likely.\u003c\/p\u003e\n\u003cp\u003eHobbyists or applications requiring very soft sealing, extreme low-temperature flexibility below -26C, or food-grade elastomers should look elsewhere, since Viton FKM is optimized for chemical and heat resistance rather than ultra-low temperature flexibility or food-contact certification.\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\u003eExcellent chemical resistance to fuels, oils and many organic solvents, reducing seal failures in exposed systems.\u003c\/li\u003e\n \u003cli\u003eHigh temperature capability to 232C (450F) for use in engine and industrial applications.\u003c\/li\u003e\n \u003cli\u003eAccurate listed actual dimensions (2.859 in ID, 3.137 in OD, 0.139 in CS) simplify replacement and groove matching.\u003c\/li\u003e\n \u003cli\u003ePack of 25 provides good value for maintenance stocking and repeat repairs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003e90A durometer is relatively firm and may not be ideal where a softer, low-pressure seal is needed.\u003c\/li\u003e\n \u003cli\u003eNot intended for food-grade or extreme cold applications below the stated temperature range.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\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 (Fluorocarbon rubber, 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 dimensions\u003c\/td\u003e\n\u003ctd\u003e2-7\/8 in ID, 3-1\/8 in OD, 1\/8 in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eActual dimensions\u003c\/td\u003e\n\u003ctd\u003e2.859 in ID, 3.137 in OD, 0.139 in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n \u003ctr\u003e\n\u003ctd\u003eMetric dimensions\u003c\/td\u003e\n\u003ctd\u003e72.62 mm ID, 79.68 mm OD, 3.53 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\n\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Mr O-Ring 233 Viton O-ring pack is a practical choice for professionals who need durable, chemically resistant seals with reliable dimensional accuracy. For applications involving petroleum products, high heat or ozone exposure, these 90A Viton rings deliver strong value, and the pack size keeps spares on hand for ongoing maintenance needs.\u003c\/p\u003e\n\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 FKM is formulated to resist petroleum, gasoline and diesel blends and is suitable for many fuel-system seals.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the effective temperature range?\u003c\/strong\u003e\u003cbr\u003eThe specified range is -26C (-15F) up to 232C (450F), which covers most engine and industrial thermal conditions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow accurate are the listed sizes?\u003c\/strong\u003e\u003cbr\u003eThe listing includes both nominal and actual dimensions (2.859 in ID, 3.137 in OD, 0.139 in CS) to help ensure proper fit when replacing or stocking seals.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48619017142491,"sku":"B07R62SXCH","price":42.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_a8885235-07e1-4904-ae21-a567e32f17ec.jpg?v=1778514484","url":"https:\/\/gearmusthave.com\/products\/233-viton-o-ring-90a-durometer-2-7-8-in-id-pack-of-25","provider":"GearMustHave","version":"1.0","type":"link"}