Gaskets • O-Rings • Buna N (Nitrile) O-Rings

Buna N is a synthetic rubber resistant to oil, fuel, and water and alcohols.

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  • RG Sales, Inc.

    RG Sales offers Buna O-rings in standard sizes 40 through 90. All standard O-rings are available in six basic compounds, Shore A hardness, and are qualified for government, aerospace, automotive, FDA, NSF, and industrial/commercial projects.

  • Daemar Inc

    Daemar Incorporated manufacture and distribute molded and back-up O-rings. Molded O-rings are available in both static and dynamic sealing, in Buna-N, Viton, EPDM, silicone, PFTE and polyacrylate. O-ring sizes for boss tube fittings are available in 70 and 90 Durometer, in metric sizes from 1.59mm to 499.30mm. Back-up rings are available in flat/washer, contoured/parback and 574 styles.

  • Elder Rubber Co

    Elder Rubber Company manufactures O-rings in Boss, standard and military specifications. All of the three types are available in sizes from 3/32" through 2", in elastomers such as silicone, EPDM, neoprene, buna, nitrile and teflon.

  • Grainger Industrial Supply

    Grainger Industrial Supply offers Buna-N O-ring seals in a variety of sizes, and are resistant to oxidation, chemicals, corrosion, oil and heat. Standard-use temperature ranges are -65F to 275F.

  • Reid Supply Company

    Reid Supply Company offers Buna-N O-rings in standard and quattro designs. Standard O-rings are available in 70 and 75 durometer. 70 durometer are oil, heat, oxidation and corrosion resistant and can maintain in temperatures between -65F through 275F. 75 durometer O-rings have the same resistance, but can function in temperatures ranging from -10F to 400F. Quattro O-rings are identical to standard O-rings, except they have four sealing surfaces instead of two, and are only available in 70 durometer.

  • Columbia Engineered Rubber, Inc.

    Columbia Engineered Rubber is a manufacturer and distributor of NBR/Buna O-rings for common and custom sealing projects. Buna rings feature petroleum,  corrosion, tear and abrasion resistance, and are designed for temperatures between -22F to 212F. Columbia has a large selection of standard (AS568), metric and custom O-rings.

  • Greene Rubber Co., Inc.

    Greene Rubber Company offers Buna-N 70 durometer O-rings that offer a strong resistance to petroleum, hydrocarbons, water/grease, hydraulic fluid, alcohol and fuel. Buna-N O-rings work in -40F to 250F temperatures and have many different compound variations for a variety of uses.

  • Vanguard Products Corp.

    Vanguard Products Corporation is a produced and distributor of custom silicone O-rings. They offer a multitude of durometer/hardness ratings, materials/colors, bonding and can be fabricated from 0.10 inches to 3-inch plus cross sections. Typical uses include electrical connectors, outdoor electrical systems, water purification systems, dairy fluid, medical equipment seals and military/aerospace grade systems.

    Vanguard is a ISO 9001:2008 certified facility, and seal silicone is consistent with FDA Regulation 21CFR177.2600 for safe food contact.

  • All Seals, Inc.

    All Seals Inc. distributes and custom designs Buna-N seals with chemical resistance to petroleum, mineral oil, diesel fuel, HFA/HFB, dilute and water compounds. Buna-N offers an ideal resistance between -30F and 212F (shorter lifespans can function in temperature extremes as low as -70F and as high as 250F.

  • Seastrom Mfg. Co., Inc.

    Seastrom Manufacturing Company offers Buna-N O-ring seals in a variety of sizes. Buna-N is resistant to most oils, solvents, chemicals and heat. Standard 70 durometer seals can be used with project temperatures between -10F through 275F.

  • Grotenrath Rubber Products Co., Inc.

    Grotenrath Rubber Products have Buna-N O-rings available in standard sizes AS, MS, MIL, AMS, AN, NAS and SAE; and in metric sizes JIS, BS, SMS, DIN and DIN: ISO. In addition to Buna-N, other compounds include silicon, EPDM, flourosilicone, urethane, hypalon, Teflon and carboxliated. Unique available compounds include Teflon encapsulated, military specifications, stainless steel and FDA certified. Practical applications are aerospace, automotive, pneumatic, medical, semi-conductor, industrial, military and appliances.

  • RPM Mechanical, Inc.

    RPM Mechanical Buna-N O-rings are available in a variety of sizes from 1/32" to 26" and also offer O-rings for tube fitting bosses 3/32" to 2".

  • Greene Rubber Co., Inc.

    Greene Rubber Company manufactures custom gaskets, O-rings and seals made of butyl, silicone, nitrile and Teflon. O-rings are available in metric, non-standard and custom sizes. Available seals include composite, metal, PFTE and rotary shafts.

    Industries served include military, aerospace, fuel and transportation.

  • Mercer Gasket & Shim

    Mercer Gasket is a distributor and manufacturer of standard, metric and international sizes. In addition, custom O-rings are available in standard cross sections matched to any length of ID. Mercer also supplies encapsulated o-rings where the original material is covered with a continuous layer of another material, such as Teflon.

  • Allied Metrics Seals & Fasteners, Inc.

    Allied Metrics Seals & Fasteners has Buna-N O-rings in an assortment of acrylonitrile contents ranging from 18 to 50%. Buna-N O-rings are resistant to abrasives, oils, diluted acids, alkalii solutions, solvents and water. The service temperature is between -55C to 100C, and can be between 40 and 90 Shore A hardness.

  • Problem Solving Products Inc

    Problem Solving Products offer a variety of Buna-N O-rings for petroleum, solution, oil,water and solvent sealing. 70 durometer Buna-N O-rings will work within a temperature range of -65F to 275F, and are used primarily for transportation, military specifications, industrial projects and commercial use.

  • Global O-Ring & Seal, LLC

    Global O-Ring and Seal offers Buna-N (nitrile) o-rings in 50, 70 and 90 durometer in AS568 sizes. Metric Buna-N 70 duro o-rings are also available. Other types of nitrile products offered include back-up rings, X-rings (quad), square cut washer rings, and more.