{"product_id":"334-viton-o-ring-75a-2-5-8-in-id-3-in-od-pack-of-100-durable-seal","title":"334 Viton O-Ring 75A, 2-5\/8 in ID 3 in OD Pack of 100 - Durable Seal","description":"\u003cp\u003eOur review of the 334 Viton O-Ring pack finds it best suited for technicians, mechanics, and hobbyists who need chemical- and heat-resistant seals in bulk. The bottom line: this pack of 100 O-rings delivers reliably consistent dimensions and the chemical resistance expected from a fluorocarbon elastomer, making it the obvious choice when replacing worn seals in fuel systems, hydraulic fittings, or heat-exposed assemblies. The reviewer found the 75A hardness provides a good balance of compressive resilience and sealing force, and the wide temperature range is the single biggest reason to choose these O-rings for demanding environments.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Made from Viton fluorocarbon elastomer, these O-rings resist many fuels and chemicals for longer service life.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated approximately -15 degrees F to 400 degrees F, allowing use from cold storage to high-heat applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDurometer:\u003c\/strong\u003e 75A hardness provides resistance to penetration while maintaining enough flexibility to form reliable seals.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShape and fit:\u003c\/strong\u003e Round cross-section and precise dimensions make them suitable as replacement O-rings for cylindrical overlapping surfaces and common fittings.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility:\u003c\/strong\u003e Acceptable for use with non-flammable hydraulic fuels, silicone oils, aromatic and aliphatic hydrocarbons, and compatible with vacuum and ozone exposure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePack size:\u003c\/strong\u003e Supplied in a pack of 100, offering value for maintenance shops and projects that require multiple replacements.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis pack is ideal for industrial maintenance crews, gunsmiths, and DIYers who replace O-rings in fuel pumps, barrels, and hardware exposed to heat and fuels. It is a good fit when consistency of size and chemical resistance are priorities and when buying in bulk reduces downtime and part shortages.\u003c\/p\u003e\u003cp\u003eThose who should look elsewhere include users who need resistance to strong alkalis, ammonia gas, certain organic acids, glycol-based brake fluids, or super-heated steam, since Viton is vulnerable to those media. Also choose a different compound if extreme low-temperature flexibility below the specified range is required.\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 fuel resistance for many common solvents and fuels.\u003c\/li\u003e\n\u003cli\u003eWide operating temperature range suitable for hot and vacuum environments.\u003c\/li\u003e\n\u003cli\u003eConsistent 2-5\/8 in ID and 3 in OD sizing in a large 100-piece pack for value and convenience.\u003c\/li\u003e\n\u003cli\u003e75A durometer gives durable resistance to penetration while maintaining sealing ability.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eNot compatible with certain alkalis, amines, or glycol-based brake fluids, which limits some applications.\u003c\/li\u003e\n\u003cli\u003e75A hardness may be stiffer than desired for very low-pressure soft-seal needs.\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 (fluorocarbon elastomer)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eColor\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eInner diameter (ID)\u003c\/td\u003e\n\u003ctd\u003e2-5\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter diameter (OD)\u003c\/td\u003e\n\u003ctd\u003e3 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCross-section \/ Width\u003c\/td\u003e\n\u003ctd\u003e3\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDurometer\u003c\/td\u003e\n\u003ctd\u003e75A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature range\u003c\/td\u003e\n\u003ctd\u003e-15 degrees F to 400 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe 334 Viton O-Ring pack is a practical, cost-effective choice for users who need reliable sealing in fuel, heat, and chemical-exposed systems. It offers durable performance and consistent sizing for maintenance work, though users exposed to alkalis or glycol brake fluids should choose a different material. Overall, its resistance profile and bulk quantity make it good value for many industrial and hobbyist applications.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eAre these O-rings suitable for fuel system use?\u003c\/strong\u003e\u003cbr\u003eYes, they are compatible with many fuels and non-flammable hydraulic fluids, making them suitable for numerous fuel system applications.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill they handle high temperatures?\u003c\/strong\u003e\u003cbr\u003eYes, Viton in this product is rated for use up to about 400 degrees F, so it performs well in high-heat environments.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan these be used with brake fluid?\u003c\/strong\u003e\u003cbr\u003eNo, Viton is vulnerable to glycol-based brake fluids, so a different elastomer is recommended for brake system seals.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48260886986971,"sku":"B000MN8HIC","price":267.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/81iyYJCP7YL._SL1500_93ca1429-70dd-466a-8dec-d1309d562656.jpg?v=1778287137","url":"https:\/\/gearmusthave.com\/products\/334-viton-o-ring-75a-2-5-8-in-id-3-in-od-pack-of-100-durable-seal","provider":"GearMustHave","version":"1.0","type":"link"}