{"product_id":"mr-o-ring-170-viton-o-ring-90a-durometer-7-3-4in-id-pack-of-5","title":"Mr O-Ring 170 Viton O-Ring 90A Durometer 7-3\/4in ID (Pack of 5)","description":"\u003cp\u003eIn this review the Mr O-Ring 170 Viton O-Ring is assessed for technicians and hobbyists who need a small, reliable sealing solution that resists fuels and high temperatures. The bottom line: this pack of five 90A durometer Viton o-rings is best for applications exposed to petroleum products, high heat or ozone where material compatibility matters; the review finds they deliver consistent dimensions and long-term chemical resistance while fitting standard AS568 sizes.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Viton (fluorocarbon FKM) offers excellent resistance to fuels, oils and many organic solvents for reliable sealing in harsh chemical environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e 90A durometer provides a firm seal that holds shape under pressure while still compressing enough for typical flange and gland applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated -26C (-15F) to 232C (450F) so it works in both low-temperature storage and very high temperature air or fluid systems.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e Sold as a pack of five which helps service technicians keep spares on hand or replace multiple seals at once without reordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard sizing:\u003c\/strong\u003e Nominal and actual dimensions align with AS568 expectations, making it straightforward to swap into standard o-ring grooves and hardware.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShelf life:\u003c\/strong\u003e Essentially unlimited under normal storage, so surplus rings remain usable over long maintenance cycles.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThe Mr O-Ring 170 Viton is aimed at professionals in hydraulics, pneumatics and fuel systems, plus serious DIYers who need a small, durable o-ring for high-temperature or chemically aggressive environments. It is particularly useful where resistance to diesel, biodiesel blends, methanol or ethanol blends and mineral oils is required.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users who need very soft seals for ultra-low compression sealing or who require food-grade or silicone-specific materials; for those needs different elastomers would be more appropriate.\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\u003eHigh chemical resistance from Viton makes it suitable for fuels, oils and many solvents.\u003c\/li\u003e\n\u003cli\u003eWide operating temperature range supports high-heat applications up to 232C (450F).\u003c\/li\u003e\n\u003cli\u003eAccurate actual dimensions (7.737in ID, 7.943in OD, 0.103in CS) ensure predictable fit in AS568-sized grooves.\u003c\/li\u003e\n\u003cli\u003ePack of five provides immediate spares for routine maintenance.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e90A hardness is relatively firm and may not seal as well as softer compounds in very low-pressure, low-compression applications.\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 (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\u003e7-3\/4in ID, 7-15\/16in OD, 3\/32in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual dimensions\u003c\/td\u003e\n\u003ctd\u003e7.737in ID, 7.943in OD, 0.103in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric dimensions\u003c\/td\u003e\n\u003ctd\u003e196.52 mm ID, 201.76 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\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e5 rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe Mr O-Ring 170 Viton 90A in this pack of five is a smart choice for anyone needing a small o-ring that resists fuels, high temperatures and ozone while matching AS568 sizing. Its accurate dimensions, long shelf life and chemical compatibility make it good value for maintenance shops and field technicians who require dependable, long-lasting seals.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these o-rings compatible with diesel and biodiesel?\u003c\/strong\u003e\u003cbr\u003eYes, Viton is compatible with diesel and many biodiesel blends and is formulated to resist petroleum products.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo these rings meet standard AS568 sizes?\u003c\/strong\u003e\u003cbr\u003eYes, the product is offered to meet AS568 size standards with nominal and actual dimensions provided for accurate replacement.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat temperatures can these o-rings handle?\u003c\/strong\u003e\u003cbr\u003eThey are rated from -26C (-15F) up to 232C (450F), suitable for high-temperature sealing applications.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48253681008859,"sku":"B07R743XT9","price":38.49,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_dd41c192-a8ed-4264-850b-adc5f495502c.jpg?v=1776354707","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-170-viton-o-ring-90a-durometer-7-3-4in-id-pack-of-5","provider":"GearMustHave","version":"1.0","type":"link"}