{"product_id":"110-buna-n-o-ring-70a-durometer-black-3-8-id-pack-of-100","title":"110 Buna-N O-Ring, 70A Durometer, Black, 3\/8\" ID, Pack of 100","description":"\u003cdiv class=\"product-description\"\u003e\n\u003ch2\u003e110 Buna-N O-Ring, 70A Durometer, Square, Black, 3\/8\" ID, 9\/16\" OD, 3\/32\" Width (Pack of 100)\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003e110 Buna-N O-Ring, 70A Durometer, Square, Black, 3\/8\" ID, 9\/16\" OD, 3\/32\" Width, Pack of 100\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThis O-ring is made of black Buna-nitrile (Buna-N) and has a durometer of 70A. It has a square cross-section and can be used across a wide temperature range (-30 degrees F\/-34 degrees C to 250 degrees F\/121 degrees C). Designed for use in a wide variety of sealing applications, this square O-ring can provide a superior seal to round O-rings in static applications, but is usually not as effective in dynamic applications. This Buna-nitrile O-ring meet standards defined by Aerospace Standard AS568A, which is the Aerospace Size Standard for O-rings. Buna-nitrile can have high tensile strength, and has abrasion, tear, and compression set resistance. It is compatible for use with petroleum, hexafluoroacetone (HFA), hexafluoro-2-butyne (HFB) and hydrofluorocarbon (HFC) fluids, vegetable oil, alcohol, acids, and aliphatic hydrocarbons. Buna-nitrile is vulnerable to acetone, ethers, esters, ozone, sunlight and weathering, and should not be used in ozone-generating electric motors, welding equipment, or in applications with exposure to UV light. The durometer hardness of this Buna O-ring is 70A. Durometers measure 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, a value of 0 indicates that a sample was completely penetrated, while a value of 100 shows no indentation in the sample. The letter following the number identifies the shore scale, which is either shore A or D. Shore A is used for softer plastics, while shore D is used for harder plastics. O-rings 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 a round cross section, and a hole in the center, similar to a doughnut. O-rings are available in various AS568A dash sizes, which is the standardized sizing for O-rings, and defines the nominal inside diameter (ID), outer diameter (OD), and cross-sectional (CS) diameter of an O-ring. \u003c\/p\u003e\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ Made of Buna-nitrile (also called Buna-N) for use with a variety of fluids from petroleum to aliphatic hydrocarbons\u003c\/li\u003e\n\u003cli\u003e✅ Durometer (hardness) of 70A for resistance to penetration\u003c\/li\u003e\n\u003cli\u003e✅ Square cross-section to provide a static seal under high pressure\u003c\/li\u003e\n\u003cli\u003e✅ For use across a wide temperature range from -30 degrees F\/-34 degrees C to 250 degrees F\/121 degrees C\u003c\/li\u003e\n\u003cli\u003e✅ Meets standards defined by Aerospace Standard AS568A\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eShipping \u0026amp; Guarantees\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ FREE standard shipping within the United States (3–6 business days)\u003c\/li\u003e\n\u003cli\u003e✅ 100% money-back guarantee for lost or damaged items\u003c\/li\u003e\n\u003cli\u003e✅ Secure checkout with encrypted payment processing\u003c\/li\u003e\n\u003cli\u003e✅ Shipping via UPS, FedEx, and USPS\u003c\/li\u003e\n\u003cli\u003e✅ Ships to lower 48 states only (no PO Boxes \/ APO \/ FPO)\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eReturns\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e✅ 30-day hassle-free returns\u003c\/li\u003e\n\u003cli\u003e✅ Items must be unused and in original packaging\u003c\/li\u003e\n\u003cli\u003e✅ Full refund if item is not delivered\u003c\/li\u003e\n\u003cli\u003e✅ Guaranteed delivery within 6–7 business days\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003ePayment Methods\u003c\/h3\u003e\n\u003cp\u003e✅ Credit Cards, PayPal, Shop Pay, Apple Pay, Google Pay, Amazon Pay, Meta Pay\u003c\/p\u003e\n\u003ch3\u003eCustomer Support\u003c\/h3\u003e\n\u003cp style=\"text-align:left;\"\u003e✅ Questions? Contact us at \u003cstrong\u003eSupport@GiftAbay.com\u003c\/strong\u003e\u003cbr\u003eWe respond within 24 hours on business days.\u003c\/p\u003e\n\u003cdiv class=\"seo-data\"\u003e\n\u003cp\u003e\u003cstrong\u003eSEO Title:\u003c\/strong\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKeywords:\u003c\/strong\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCategory:\u003c\/strong\u003e Industrial \u0026amp; Scientific\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSubcategories:\u003c\/strong\u003e Hydraulics, Pneumatics \u0026amp; Plumbing, Seals \u0026amp; O-Rings, O-Rings\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sterling Seal","offers":[{"title":"Default Title","offer_id":44648901247021,"sku":"PGABL1785402","price":21.09,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/6067\/7677\/files\/51wag0k5uaL._SL1261_87e91b27-bd37-4829-be1a-a744211fc92b.jpg?v=1772198011","url":"https:\/\/prosupply.giftabay.com\/products\/110-buna-n-o-ring-70a-durometer-black-3-8-id-pack-of-100","provider":"ProSupply.GiftAbay","version":"1.0","type":"link"}