{"product_id":"mr-o-ring-218-viton-o-ring-90a-1-1-4-in-id-pack-of-50","title":"Mr O-Ring 218 Viton O-Ring 90A, 1-1\/4 in ID - Pack of 50","description":"\u003cp\u003eIn this review the Mr O-Ring 218 Viton O-Ring is evaluated for workshops, maintenance shops and industrial users who need high-temperature, chemical-resistant seals in quantity. The bottom line: this pack of 50 Viton o-rings is a practical, cost-effective choice when you need consistent, high-durometer sealing material that resists fuels, oils and heat. The reviewer found the 90A durometer and actual nominal-to-actual sizing to be reliable for static and light dynamic seals, and the wide temperature range makes these o-rings suitable for demanding environments.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Viton (FKM) offers exceptional resistance to high temperature and many chemicals, which keeps seals intact where other rubbers fail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e The 90A durometer provides a firm seal that resists extrusion and deformation under pressure while maintaining sealing contact.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize accuracy:\u003c\/strong\u003e Nominal 1-1\/4 in ID and 1-1\/8 in cross-section match closely to actual dimensions for predictable fit in standard AS568 grooves.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -26C (-15F) to 232C (450F), these o-rings handle hot engine bays and high-temperature processing without rapid degradation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical compatibility:\u003c\/strong\u003e Performs well with petroleum, diesel and biodiesel blends, methanol or ethanol blends, silicone oils, and many organic solvents, reducing the need for multiple material types.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e A pack of 50 supplies routine maintenance needs and reduces frequent reordering for shops with ongoing seal replacement.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThese o-rings are best for maintenance technicians, HVAC and automotive professionals, and industrial users who require robust seals that tolerate heat, oils and common fuels. The pack size and consistent 90A hardness make them suited to preventive maintenance kits or small production runs.\u003c\/p\u003e\u003cp\u003eThose needing ultra-soft seals for delicate, low-pressure applications or specialized compounds with extreme acid resistance beyond general chemical exposure should look at other elastomers. Also, if a precise metric nominal is mandatory rather than AS568 sizing, confirm fit before large purchases.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eHigh chemical and heat resistance extends service life in aggressive environments.\u003c\/li\u003e\n\u003cli\u003e90A durometer gives a reliable, firm seal that resists extrusion and retains shape.\u003c\/li\u003e\n\u003cli\u003eActual dimensions closely match nominal sizes for predictable installation in standard grooves.\u003c\/li\u003e\n\u003cli\u003eBulk pack of 50 is economical for shops and maintenance teams.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003e90A is relatively hard, so it may not be ideal where a softer, more compliant seal is required.\u003c\/li\u003e\n\u003cli\u003eNot all niche chemicals are covered; verify compatibility for specialized solvents.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\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 dimensions\u003c\/td\u003e\n\u003ctd\u003e1-1\/4 in ID, 1-1\/2 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\u003e1.234 in ID, 1.512 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\u003e31.34 mm ID, 38.40 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\u003ctr\u003e\n\u003ctd\u003ePack size\u003c\/td\u003e\n\u003ctd\u003e50 pieces\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Mr O-Ring 218 Viton o-ring pack is a smart buy for technicians and small shops that need durable, heat- and chemical-resistant seals in quantity. Its 90A hardness and close actual-to-nominal sizing make installation predictable and reliable, offering good value compared with single-piece sourcing. Choose these when you need bulk, high-performance Viton o-rings for routine maintenance and industrial sealing tasks.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAre these o-rings compatible with fuels?\u003c\/strong\u003e\u003cbr\u003eYes; they perform well with petroleum, gasoline blends, diesel and biodiesel blends, as well as with methanol or ethanol blends in typical sealing applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 90A hardness work for dynamic seals?\u003c\/strong\u003e\u003cbr\u003e90A is suitable for many light dynamic and static sealing tasks, but for high-speed dynamic shafts you may prefer a softer compound designed for dynamic wear.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow long do these o-rings last in storage?\u003c\/strong\u003e\u003cbr\u003eThe material has an unlimited shelf-life when stored away from direct sunlight and excessive ozone, per the product information.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48258599944411,"sku":"B07R43JX2D","price":39.59,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_68826048-904c-43a8-a86b-86a79e908d78.jpg?v=1778323272","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-218-viton-o-ring-90a-1-1-4-in-id-pack-of-50","provider":"GearMustHave","version":"1.0","type":"link"}