{"product_id":"119-o-ring-buna-n-90a-15-16-in-id-1-1-8-in-od-bulk-pack","title":"119 O-Ring Buna-N 90A 15\/16 in ID 1-1\/8 in OD - Bulk Pack","description":"\u003cp\u003eIn this review the 119 O-Ring in black Buna-N with a 90A durometer is evaluated for workshop and field sealing tasks; it is targeted at technicians, hobbyists and maintenance crews who need a large bulk supply of tough O-rings for petroleum and hydraulic-related applications. The single biggest reason to buy is the combination of material compatibility and quantity: a pack of 500 provides a ready supply of AS568A-size rings that resist abrasion, tearing and compression set, making them a practical choice when durability and spare inventory matter.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Buna-nitrile (Buna-N) offers compatibility with petroleum, HFC fluids, vegetable oil and many aliphatic hydrocarbons for versatile sealing use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHardness:\u003c\/strong\u003e 90A durometer gives a firmer, more wear-resistant seal that holds shape under compression in demanding applications.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTemperature range:\u003c\/strong\u003e Rated from -40 degrees F to 212 degrees F, so the rings function across cold storage and typical engine or hydraulic temperatures.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandard sizing:\u003c\/strong\u003e Meets AS568A aerospace size standard so the 15\/16 in ID and 1-1\/8 in OD dimensions fit common gland designs and replacement tasks.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCross-section:\u003c\/strong\u003e Round profile creates a consistent seal between cylindrical overlapping surfaces for couplers, hose fittings and quick disconnects.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBulk supply:\u003c\/strong\u003e Pack of 500 provides cost-effective inventory for maintenance shops, preventing downtime from missing spare rings.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWho It's For\u003c\/h2\u003e\n\u003cp\u003eThis pack is best for maintenance technicians, agricultural and boating owners, and hydraulic or pneumatic repair shops that replace O-rings frequently or retrofit multiple couplers and fittings. It suits anyone who values durability and a firmer seal when working with petroleum-based fluids or common hydraulic media.\u003c\/p\u003e\n\u003cp\u003eThose who should look elsewhere include users needing extreme low-temperature elastomers, applications exposed to ozone or sunlight for long periods, or systems that require elastomers specifically rated for strong solvents like acetone, ethers or esters; Buna-N is vulnerable to those agents and weathering over time.\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\u003eGood value: the 500-count pack reduces per-unit cost for frequent replacement or stocking.\u003c\/li\u003e\n\u003cli\u003eDurable: customers report heavy-duty performance and reliable sealing on couplers and garden hose fittings.\u003c\/li\u003e\n\u003cli\u003eWide compatibility: suitable for petroleum, vegetable oil, HFCs and many aliphatic hydrocarbons used in industry.\u003c\/li\u003e\n\u003cli\u003eConsistent fit: meets AS568A dimensions so rings fit standard glands and quick disconnects.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eFirm hardness: at 90A some users find the rings quite stiff, which can make initial installation trickier compared with softer compounds.\u003c\/li\u003e\n\u003cli\u003eNot resistant to solvents like acetone or prolonged ozone and sunlight exposure, limiting outdoor longevity in some conditions.\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\u003eBuna-nitrile (Buna-N)\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\u003eInner Diameter\u003c\/td\u003e\n\u003ctd\u003e15\/16 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOuter Diameter\u003c\/td\u003e\n\u003ctd\u003e1-1\/8 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWidth\u003c\/td\u003e\n\u003ctd\u003e3\/32 in\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTemperature Range\u003c\/td\u003e\n\u003ctd\u003e-40 degrees F to 212 degrees F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eQuantity\u003c\/td\u003e\n\u003ctd\u003ePack of 500\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\u003ch2\u003eOur Verdict\u003c\/h2\u003e\n\u003cp\u003eThe 119 Buna-N 90A O-ring pack is a practical buy for shops and owners who need a large, durable supply of standard-size seals that work well with petroleum and hydraulic fluids. While the 90A hardness can feel stiff at first, the rings deliver abrasion and compression resistance and represent solid value when matched to compatible fluids and environments.\u003c\/p\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eAre these O-rings compatible with petroleum-based oils?\u003c\/strong\u003e\u003cbr\u003eYes. Buna-N is compatible with petroleum and many aliphatic hydrocarbons, making these rings suitable for common oil and fuel sealing tasks.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill they work in cold temperatures?\u003c\/strong\u003e\u003cbr\u003eYes. The rated temperature range extends down to -40 degrees F, so they remain functional in most cold-weather applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo they resist sunlight and strong solvents?\u003c\/strong\u003e\u003cbr\u003eNo. Buna-N is vulnerable to ozone, sunlight and solvents like acetone and some esters, so avoid prolonged outdoor exposure and aggressive solvent contact.\u003c\/p\u003e","brand":"Mr O-Ring","offers":[{"title":"Default Title","offer_id":48638655627483,"sku":"B00M909IBQ","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/514anOq3sCL._SL1224_8f13490c-d726-4a0f-89e3-ff1892fa4f9f.jpg?v=1778591069","url":"https:\/\/gearmusthave.com\/products\/119-o-ring-buna-n-90a-15-16-in-id-1-1-8-in-od-bulk-pack","provider":"GearMustHave","version":"1.0","type":"link"}