{"product_id":"mr-o-ring-330-viton-o-ring-90a-durometer-2-1-8in-id-pack-of-10","title":"Mr O-Ring 330 Viton O-Ring 90A Durometer 2-1\/8in ID Pack of 10","description":"\u003cp\u003eIn this review the Mr O-Ring 330 Viton O-Ring (pack of 10) is evaluated for technicians and hobbyists who need a high-temperature, fuel-resistant seal in a common AS568 size. The bottom line: this 90A durometer Viton o-ring stands out for chemical and thermal resilience, making it a practical choice where fuel, oil, or elevated temperature exposure is expected. The review focuses on real-world sealing performance, dimensional accuracy, and material suitability so you can decide if this pack of 10 fits your maintenance or repair needs.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Fluorocarbon rubber (Viton\/FKM) offers exceptional resistance to high temperatures, ozone, weather and many organic solvents, so seals hold up in harsh conditions.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e 90A hardness provides a firm sealing surface that resists extrusion while still compressing enough to form reliable static and low-dynamic seals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize accuracy:\u003c\/strong\u003e Nominal and actual dimensions are closely matched to AS568 sizing, which helps replacement installs fit into existing grooves without modification.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical compatibility:\u003c\/strong\u003e Performs well with petroleum fuels, diesel blends, methanol\/ethanol blends, hydraulic fluids and many oils, reducing downtime from seal failures in these media.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -26C (-15F) to 232C (450F), enabling use in both cold starts and very high temperature applications where many elastomers would soften or crack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e Sold as a pack of 10, making it easy to stock common replacement parts for workshop maintenance or multiple assembly points.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis product suits mechanics, HVAC and hydraulic technicians, and fabricators who need durable, fuel- and oil-resistant seals in the AS568 size equivalent to 2-1\/8in ID. The firm 90A durometer is particularly beneficial where extrusion resistance and dimensional stability matter, such as static face seals, fuel system components, and some high-temperature housings.\u003c\/p\u003e\n\u003cp\u003eIt may be less suitable for extremely dynamic rotary shaft seals that require lower durometer compounds for flexibility, or for applications requiring FDA-grade elastomers; in those cases users should choose a different material or hardness designed for continuous dynamic movement or food contact.\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 high-temperature resistance reduces replacement frequency in fuel and oil-exposed systems.\u003c\/li\u003e\n\u003cli\u003e90A hardness provides strong extrusion resistance and stable sealing under compression.\u003c\/li\u003e\n\u003cli\u003eDimensional specs list both nominal and actual dimensions, helping installers confirm fit before use.\u003c\/li\u003e\n\u003cli\u003ePack of 10 is convenient for maintenance kits or multiple repairs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigher 90A durometer is less flexible than softer o-rings, so it is not ideal for highly dynamic rotary seals requiring more pliability.\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 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\u003e2-1\/8in ID, 2-1\/2in OD, 3\/16in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual dimensions\u003c\/td\u003e\n\u003ctd\u003e2.100in ID, 2.520in OD, 0.210in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric dimensions\u003c\/td\u003e\n\u003ctd\u003e53.34 mm ID, 64.00 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\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e10\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Mr O-Ring 330 Viton 90A o-ring pack is a sensible choice for anyone needing a robust, fuel- and heat-resistant replacement in the AS568 size family. It delivers reliable chemical compatibility and dimensional accuracy at a reasonable value, especially for maintenance shops and technicians who keep spares on hand. Choose a different hardness only if you need greater flexibility for continuous dynamic sealing.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these o-rings compatible with gasoline and diesel?\u003c\/strong\u003e\u003cbr\u003eYes, the Viton compound is formulated to perform well with petroleum fuels, diesel and common fuel blends including methanol or ethanol mixes.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the 90A hardness work for my rotating shaft seal?\u003c\/strong\u003e\u003cbr\u003e90A is relatively firm and better suited to static seals or low-dynamic applications; for continuous rotary shafts a softer compound is often preferred for flexibility.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these meet an AS568 size standard?\u003c\/strong\u003e\u003cbr\u003eYes, the product is designed to meet size standards defined by AS568 and lists both nominal and actual dimensions for verification.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48601941246171,"sku":"B07R73YRH9","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_2b9b9a05-456a-4c94-8f1d-5a2fbb34020d.jpg?v=1778753257","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-330-viton-o-ring-90a-durometer-2-1-8in-id-pack-of-10","provider":"GearMustHave","version":"1.0","type":"link"}