{"product_id":"sterling-seal-supply-342-buna-nitrile-o-ring-70a-durometer-black-3-5-8-id-4-od-3-16-width-pack-of-5","title":"Sterling Seal \u0026 Supply 342 Buna\/Nitrile O-Ring, 70A Durometer, Black, 3-5\/8\" ID, 4\" OD, 3\/16\" Width (Pack of 5)","description":"\u003ch3\u003eKey features\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eMade of Buna-nitrile (also called Buna-N) for use with a variety of fluids and hydrocarbons\u003c\/li\u003e\n\u003cli\u003eTemperature Range: -35°C (-31°F) to 120°C (248°F); Shelf-life: 15 Years\u003c\/li\u003e\n\u003cli\u003eThese versatile o-rings perform well in petroleum based oils \u0026amp; fuels, aliphatic hydrocarbons, vegetable oils, silicone oils \u0026amp; greases, ethylene glycol, dilute acids, and water to below 100°C (212°F)\u003c\/li\u003e\n\u003cli\u003eDurometer (hardness) of 70A for resistance to penetration\u003c\/li\u003e\n\u003cli\u003eO-ring Size meets standards defined by AS568A (b) ID (Nominal): 3-5\/8 OD (Nominal): 3\/16 CS (Nominal): 4\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThis O-ring is made of black Buna-nitrile, is round in cross-section, has a durometer of 70A, and is designed for use in a wide variety of sealing applications. Buna-nitrile can have high tensile strength, and abrasion, tear, and compression set resistance. It can be used in temperatures between -30 degrees F (-34 degrees C) to 250 degrees F (121 degrees C), and is compatible for use with petroleum, HFA, HFB and HFC fluids, vegetable oil, alcohol, acids and aliphatic hydrocarbons. Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering and should therefore not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light. This Buna O-ring has a shore durometer of 70A. Shore durometer is the hardness of a material, and its resistance to permanent indentation. A higher durometer value indicates greater resistance to indentation on a scale of 0 to 100, with 100 indicating no indentation. O-rings commonly provide a pressure and fluid seal between cylindrically shaped, overlapping mating surfaces and are commonly seen in engines, faucets, flanges, valves, and various cylinders. They are circular in shape, with \u003c\/p\u003e\u003cp\u003eFree shipping included. 30-day hassle-free returns.\u003c\/p\u003e","brand":"Belmont Warehouse","offers":[{"title":"Default Title","offer_id":43357678043345,"sku":"BW-B0CQKK7KL7","price":20.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/3123\/5793\/files\/51pDDpc4gjL._AC_SL1500_84ce20e8-1a8c-42a1-a7b2-b351d5bc3c05.jpg?v=1790985740","url":"https:\/\/belmontwarehouse.com\/products\/sterling-seal-supply-342-buna-nitrile-o-ring-70a-durometer-black-3-5-8-id-4-od-3-16-width-pack-of-5","provider":"Belmont Warehouse","version":"1.0","type":"link"}