{"product_id":"mr-o-ring-430-viton-o-ring-90a-5-1-8in-id-pack-of-5","title":"Mr O-Ring 430 Viton O-Ring 90A, 5-1\/8in ID (Pack of 5)","description":"\u003cp\u003eIn this review the Mr O-Ring 430 Viton O-Ring is evaluated for technicians and DIYers who need a durable, heat-resistant sealing solution. The bottom line: this pack of five 90A durometer Viton o-rings is best for applications exposed to fuels, oils, high temperatures or ozone where a tight, long-lasting seal is required. The reviewer found the material, nominal and actual dimensions, and broad chemical compatibility make these o-rings a reliable choice for plumbing, fuel systems, hydraulic fittings and equipment maintenance.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 430 Viton (FKM) provides excellent resistance to fuels, oils and many chemicals, reducing seal failure in aggressive environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e 90A durometer delivers a firm seal that resists extrusion and maintains shape under compression in demanding assemblies.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -26C to 232C (-15F to 450F), so the o-ring works in both cold starts and high temperature operation.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e Sold as a pack of 5, which is convenient for routine maintenance and small repair jobs without buying bulk quantities.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize accuracy:\u003c\/strong\u003e Nominal and actual dimensions are listed, helping match replacements precisely to worn parts and preventing fit issues.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandards:\u003c\/strong\u003e Sized to meet AS568 standards, making it straightforward to swap into common industry grooves and housings.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis o-ring is aimed at mechanics, HVAC and plumbing technicians, and equipment maintainers who encounter fuels, hydraulic fluids, or high temperature applications and need a dependable sealing element. Its resistance to petroleum, biodiesel blends, methanol or ethanol blends, and most organic solvents makes it suited to automotive and industrial use.\u003c\/p\u003e\u003cp\u003eThose working exclusively with low-temperature elastomers for extremely flexible seals, or applications requiring food-grade or medical-grade elastomers, should look for specialized compounds instead; the Viton FKM material is engineered for chemical and thermal resistance rather than food safety or maximum softness.\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 high temperature resistance from the 430 Viton compound.\u003c\/li\u003e\n\u003cli\u003e90A durometer balances firmness and sealing capability to resist extrusion in many assemblies.\u003c\/li\u003e\n\u003cli\u003ePack of 5 provides a practical supply for repairs and routine maintenance.\u003c\/li\u003e\n\u003cli\u003eActual and metric dimensions are provided for accurate replacements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eNot intended for food or medical use where specific certifications are required.\u003c\/li\u003e\n\u003cli\u003eHigher hardness may be less forgiving in applications that require a very soft gasket feel.\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\u003e430 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\u003e5-1\/8in ID, 5-5\/8in OD, 1\/4in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual dimensions\u003c\/td\u003e\n\u003ctd\u003e5.100in ID, 5.650in OD, 0.275in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric dimensions\u003c\/td\u003e\n\u003ctd\u003e129.54 mm ID, 143.52 mm OD, 6.99 mm CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e-26C to 232C (-15F to 450F)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePack quantity\u003c\/td\u003e\n\u003ctd\u003e5 o-rings\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe Mr O-Ring 430 Viton 90A, 5-1\/8in ID pack of 5 is a practical, value-minded choice for maintenance work that requires chemical and thermal resilience. It is worth buying for automotive, hydraulic, and industrial sealing tasks because the material and size information support accurate replacements and long service life under demanding conditions.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAre these o-rings compatible with diesel and biodiesel?\u003c\/strong\u003e\u003cbr\u003eYes, the 430 Viton compound is specified to perform well with diesel and blends including biodiesel.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 90A hardness work for high temperature applications?\u003c\/strong\u003e\u003cbr\u003eYes, the 90A Viton is rated to 232C (450F) and retains sealing properties across that temperature range.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo these meet standard sizing for replacements?\u003c\/strong\u003e\u003cbr\u003eThe product is offered to AS568 size standards and includes both nominal and actual dimensions for accurate matching.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48244922745051,"sku":"B07R86MLLM","price":76.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_57b019b0-b347-4cc9-aecd-7322e92f2717.jpg?v=1770929920","url":"https:\/\/gearmusthave.com\/products\/mr-o-ring-430-viton-o-ring-90a-5-1-8in-id-pack-of-5","provider":"GearMustHave","version":"1.0","type":"link"}