{"product_id":"153-viton-o-ring-90a-durometer-3-1-2-in-id-pack-of-25-durable-seal","title":"153 Viton O-Ring 90A Durometer 3-1\/2 in ID Pack of 25 - Durable Seal","description":"\u003cp\u003eIn this review the Mr O-Ring 153 Viton O-Ring is evaluated for technicians, mechanics, and maintenance buyers who need a high-temperature, fuel-resistant seal in a standard AS568 size. The bottom line: this pack of 25 delivers consistent, factory-sized o-rings in a stiff 90A durometer that hold up where petroleum, hydraulic fluids, and high heat are present. For anyone replacing seals exposed to fuels, oils or elevated temperatures the primary reason to buy is the material performance of \u003cstrong\u003eViton FKM\u003c\/strong\u003e across a wide temperature range and its compatibility with common automotive and industrial fluids.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Viton FKM composition gives strong resistance to petroleum products, fuels, and many chemicals, reducing premature seal failures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e 90A durometer provides a firmer seal that resists extrusion and maintains shape under compression in demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e Comes as a pack of 25 so service shops and hobbyists can replace multiple seals without frequent reorders.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -26C (-15F) to 232C (450F), suitable for high-temperature engine and industrial environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize accuracy:\u003c\/strong\u003e Nominal AS568 size with actual dimensions close to spec for predictable fit in standard grooves.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis product suits professional mechanics, HVAC and hydraulic technicians, and industrial maintenance staff who need a reliable seal material that resists fuels, oils, and high temperatures. The pack quantity and standardized size make it practical for routine servicing and OEM replacement where AS568 dimensions are required.\u003c\/p\u003e\u003cp\u003eThose who need very soft seals for ultra-low-pressure gasketing or food-grade elastomers should look elsewhere; Viton at 90A is intentionally firm and is not specified for potable water or food contact where regulatory grades are required.\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 temperature resistance thanks to \u003cstrong\u003eViton\u003c\/strong\u003e, suitable for fuels, oils, and many solvents.\u003c\/li\u003e\n\u003cli\u003eConsistent sizing with actual dimensions near nominal for predictable installation.\u003c\/li\u003e\n\u003cli\u003eBulk pack of 25 reduces downtime for shops replacing multiple seals.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003e90A hardness is relatively firm, which may be unsuitable where a softer sealing surface is needed.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct\u003c\/td\u003e\n\u003ctd\u003e153 Viton O-Ring, 90A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal ID\u003c\/td\u003e\n\u003ctd\u003e3-1\/2 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal OD\u003c\/td\u003e\n\u003ctd\u003e3-11\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eNominal CS\u003c\/td\u003e\n\u003ctd\u003e3\/32 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual Dimensions\u003c\/td\u003e\n\u003ctd\u003e3.487 in ID, 3.693 in OD, 0.103 in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric Dimensions\u003c\/td\u003e\n\u003ctd\u003e88.57 mm ID, 93.81 mm OD, 2.62 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 153 Viton 90A is a solid choice for professionals needing a durable, heat- and fuel-resistant seal in a standard AS568 size; the pack of 25 is cost effective for routine maintenance and the material performance offers long service life in harsh environments.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAre these o-rings compatible with gasoline and diesel?\u003c\/strong\u003e\u003cbr\u003eYes, Viton FKM is formulated to resist petroleum fuels including gasoline and diesel as well as many fuel blends.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo the rings meet AS568 sizing?\u003c\/strong\u003e\u003cbr\u003eYes, the product is offered to AS568 size standards with actual dimensions provided to confirm fit.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat applications are best for 90A hardness?\u003c\/strong\u003e\u003cbr\u003e90A is best where a firmer seal is required to resist extrusion and maintain shape under pressure and heat, common in hydraulic, fuel, and engine service.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48249966690523,"sku":"B07R73BSBF","price":41.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_14e9537f-d398-4346-a303-a9312f2b1fe9.jpg?v=1771092899","url":"https:\/\/gearmusthave.com\/products\/153-viton-o-ring-90a-durometer-3-1-2-in-id-pack-of-25-durable-seal","provider":"GearMustHave","version":"1.0","type":"link"}