{"product_id":"mr-o-ring-270-viton-o-ring-90a-durometer-9-in-id-pack-of-5","title":"Mr O-Ring 270 Viton O-Ring 90A Durometer 9 in ID Pack of 5","description":"\u003cp\u003eIn this review the Mr O-Ring 270 Viton O-Ring is presented for technicians and hobbyists who need a high-temperature, fuel-resistant seal in a commonly used size. The bottom line: it is a dependable, purpose-built o-ring designed to meet AS568 sizing and to resist fuels, oils and high heat. Reviewers will appreciate that the 90A durometer Viton compound balances firmness with sealing reliability, and the pack of five gives spare parts for installations or maintenance.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 270 Viton (FKM) offers excellent resistance to fuels, mineral oils and many organic solvents for long service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -26C (-15F) to 232C (450F), it works in high-temperature environments where many elastomers fail.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize accuracy:\u003c\/strong\u003e Nominal 9 in ID, 9-1\/4 in OD and 1\/8 in cross-section with actual measured dimensions very close to nominal for reliable fit.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e The 90A hardness provides a firm seal that resists extrusion while still conforming to sealing surfaces under compression.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePacked quantity:\u003c\/strong\u003e Comes as a pack of 5, giving spares for installation, testing or replacement without buying multiple single units.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThe Mr O-Ring 270 Viton is best for maintenance technicians, hydraulic and fuel system mechanics, and industrial users who require a durable, high-temperature o-ring in AS568-equivalent sizes. It is suited to applications exposed to petroleum products, diesel blends, methanol or ethanol blends, greases and high vacuum environments.\u003c\/p\u003e\u003cp\u003eUsers who need extremely soft seals for low-pressure pneumatic systems or who require FDA food-grade certification should look elsewhere, since this product is focused on chemical and thermal resistance rather than food contact compliance.\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 resistance to fuels, oils and many solvents thanks to the Viton (FKM) compound.\u003c\/li\u003e\n\u003cli\u003eWide operating temperature range suitable for high-heat applications up to 232C (450F).\u003c\/li\u003e\n\u003cli\u003eAccurate sizing and AS568-compliant dimensions make replacement straightforward in standard grooves.\u003c\/li\u003e\n\u003cli\u003ePack of five provides spare parts for repairs and reduces downtime.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\u003cli\u003eAt 90A durometer the o-ring is relatively firm, which may be less ideal for low-pressure seals that need a softer material.\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003e270 Viton (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\u003e9 in ID, 9-1\/4 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\u003e8.984 in ID, 9.262 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\u003e228.19 mm ID, 235.25 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 quantity\u003c\/td\u003e\n\u003ctd\u003e5\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Mr O-Ring 270 Viton 90A in the 9 in size is a practical choice for users who need a heat- and fuel-resistant seal that matches AS568 sizing. It is good value for maintenance and industrial work where chemical resistance and temperature tolerance matter, and the pack of five reduces the need to reorder frequently.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eIs this o-ring suitable for fuel systems?\u003c\/strong\u003e\u003cbr\u003eYes, the Viton (FKM) compound performs well with petroleum fuels, diesel and fuel blends.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 90A hardness seal low-pressure applications?\u003c\/strong\u003e\u003cbr\u003eThe 90A durometer is relatively firm; it seals well under compression but softer compounds may be better for very low-pressure or delicate seals.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes it conform to standard sizes?\u003c\/strong\u003e\u003cbr\u003eYes, the o-ring meets AS568-equivalent dimensions and the actual measurements closely match the nominal size.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48635264467163,"sku":"B07R542WLZ","price":52.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_e54fda5c-8a13-4f24-9ccd-c52780564b4e.jpg?v=1778560357","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-270-viton-o-ring-90a-durometer-9-in-id-pack-of-5","provider":"GearMustHave","version":"1.0","type":"link"}