{"product_id":"109-viton-o-ring-90a-5-16in-id-1-2in-od-pack-of-500-high-temp-seal","title":"109 Viton O-Ring 90A 5\/16in ID 1\/2in OD Pack of 500 - High Temp Seal","description":"\u003cp\u003eIn this review the focus is on a workhorse sealing part: the 109 Viton O-Ring in a bulk pack of 500. This product is aimed at technicians, maintenance shops, and builders who need consistent, high temperature resistant seals for fuel systems, hydraulic connections, or equipment exposed to oils and solvents. The single biggest reason to buy is predictable chemical and temperature resistance from a 90A durometer FKM compound supplied in a standard AS568 size, which keeps replacement simple and inventory costs low.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e The FKM Viton compound resists high temperatures, fuels and many solvents so seals last longer in demanding environments.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e The 90A durometer gives a firm cross-section that maintains a reliable compression seal under pressure and repeated cycles.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize accuracy:\u003c\/strong\u003e Nominal and actual dimensions are provided so buyers can confirm fit; the actual ID is 0.299in and OD is 0.505in for consistent installations.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWide temperature range:\u003c\/strong\u003e Rated from -26C (-15F) to 232C (450F), this o-ring suits applications from low-temperature service up to very high operating heat.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eChemical versatility:\u003c\/strong\u003e Performs well with petroleum, diesel, biodiesel blends, methanol or ethanol blends and mineral or silicone oils, reducing part variation needs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulk pack:\u003c\/strong\u003e Supplied as a pack of 500 which is cost effective for shops and maintenance programs that consume parts regularly.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis o-ring is well suited to mechanics, hydraulics shops, and OEM maintenance teams who replace seals frequently and need an FKM solution that meets AS568 sizing standards. The bulk pack equals lower unit cost and ensures compatible spares are on hand for fuel systems, pumps, and high temperature seals.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include applications requiring food-grade or peroxide-cured silicone seals, extremely soft elastomers for low-pressure static seals, or exotic chemical compatibility beyond typical hydrocarbons and common solvents. For those use cases choose a material specified for that chemistry.\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\u003eExcellent high temperature and chemical resistance from the Viton (FKM) formulation.\u003c\/li\u003e\n\u003cli\u003eReliable dimensional data with both nominal and actual measurements for accurate selection.\u003c\/li\u003e\n\u003cli\u003e90A hardness provides durable sealing under pressure and repeated cycles.\u003c\/li\u003e\n\u003cli\u003eLarge 500-count pack reduces per-unit cost and keeps shops stocked.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eNot suitable where food-grade or very soft elastomers are required due to its FKM compound and 90A hardness.\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\u003e5\/16in ID, 1\/2in OD, 3\/32in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eActual Dimensions\u003c\/td\u003e\n\u003ctd\u003e0.299in ID, 0.505in OD, 0.103in CS\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMetric Dimensions\u003c\/td\u003e\n\u003ctd\u003e7.59 mm ID, 12.83 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\u003e500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 109 Viton O-Ring in a 500 pack is a practical choice for workshops and maintenance teams that need reliable, high temperature and chemical resistant seals in a common AS568 size. It is good value for anyone replacing fuel system and hydraulic seals regularly, though not intended for food-grade or extremely low durometer requirements.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these o-rings compatible with diesel and biodiesel blends?\u003c\/strong\u003e\u003cbr\u003eYes. The Viton compound is specified to perform well with diesel and diesel blended with biodiesel.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo the listed dimensions reflect actual measured size?\u003c\/strong\u003e\u003cbr\u003eYes. The product lists both nominal (5\/16in ID, 1\/2in OD) and actual dimensions (0.299in ID, 0.505in OD, 0.103in CS) for accurate fit confirmation.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs this material suitable for very high temperature applications?\u003c\/strong\u003e\u003cbr\u003eYes. The o-ring is rated up to 232C (450F) and is intended for high temperature resistance.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48260393992411,"sku":"B07R87GQH2","price":63.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/51Kuv29LevL._SL1000_427b232d-a290-4cd0-b4a6-c98b63ecad2e.jpg?v=1776600045","url":"https:\/\/gearmusthave.com\/products\/109-viton-o-ring-90a-5-16in-id-1-2in-od-pack-of-500-high-temp-seal","provider":"GearMustHave","version":"1.0","type":"link"}