NBR O-ring 70 Shore A

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The origin of NBR

Nitrile-butadiene rubber (NBR) was developed by the chemical company ‘I.G. Farbenindusty’ from Germany between WWI and WWII. At first the material was called Buna-N® and was later renamed to Perbunan®. The material first came to market in the 30s and is nowadays the most used elastomer for standard seals like O-rings and other seals.

What is NBR?

NBR is an elastomer, which is a synthetic polymer obtained by the copolymerization of acrylonitrile and 1,3-butadiene. The characteristics are partly determined by the amount of acrylonitrile in the material and this varies from 18 to 50 percent. As the acrylonitrile increases, resistance to petroleum base oils and hydrocarbon fuels increases, but low temperature flexibility decreases and the rubber can become brittle.

What is NBR used for?

  • Seals
  • O-rings
  • Gaskets
  • Pipe and Cable Covers

The advantages of NBR

  • Resistant against oils, fats, hydrocarbons, diluted acids
  • Has good mechanical qualities and is wear-resistant
  • Good resistance to heat
  • It is powerful and elastic
  • It has a working temperature range of -35°C tot + 120°C (-30 ° F tot + 250 ° F)

The downside of NBR

  • It has limited resistance to weather and ozone conditions
  • Not well resistant to aromatic compounds, halogenated hydrocarbons, ketone brake fluids and strong acids
  • Must be kept out of direct sunlight
  • The working temperature range is limited in comparison to other materials

On this page we offer our range of 70 Shore A O-Rings. Search for your specific O ring by using the filters on the left of the page or take your time and browse our wide range of our products. When you can not find the product you are looking for in our 70 Shore A made from NBR, please send us a Direct Enquiry. Together we can discuss the specifications and find the right product for you.

29571 products
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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 14x1.5 NBR-BUNA - 70 Shore A - Black - ORSV2-14x1.5-NBR69 O-ring Black14 X 1.5NBR-Buna58 icon
O-Ring 72x5 NBR-BUNA - 70 Shore A - Black - ORSV2-72x5-NBR69 O-ring Black72 X 5NBR-Buna54 icon
O-Ring 20x1.3 NBR-BUNA - 70 Shore A - Black - ORSV2-20x1.3-NBR69 O-ring Black20 X 1.3NBR-Buna70 Shore ANee52 icon
O-Ring 19.5x2.5 NBR-BUNA - 70 Shore A - Black - ORSV2-19.5x2.4-NBR69 O-ring Black19.5 X 2.4NBR-Buna70 Shore ANee56 icon
O-Ring 56x2 NBR-BUNA - 70 Shore A - Black - ORSV2-56x2-NBR69 O-ring Black56 X 2NBR-Buna70 Shore ANee53 icon
O-Ring 262x4 NBR-BUNA - 70 Shore A - Black - ORSV2-262x4-NBR69 O-ring Black262 X 4NBR-Buna70 Shore ANee54 icon
O-Ring 145x25 NBR-BUNA - 70 Shore A - Black - ORSV2-145x25-NBR69 O-ring Black145 X 25NBR-Buna70 Shore ANee55 icon
O-Ring 164.47x5.34 NBR-BUNA - 70 Shore A - Black - ORSV2-164.47x5.33-NBR69 O-ring Black164.47 X 5.33NBR-Buna70 Shore ANee51 icon
O-Ring 592x8 NBR-BUNA - 70 Shore A - Black - ORSV2-592x8-NBR69 O-ring Black592 X 8NBR-Buna70 Shore ANee57 icon
O-Ring 101.32x1.78 NBR-BUNA - 70 Shore A - Black - ORSV2-101.32x1.78-NBR69 O-ring Black101.32 X 1.78NBR-Buna78 Shore ANee56 icon
O-Ring 132x5 NBR-BUNA - 70 Shore A - Black - ORSV2-132x5-NBR69 O-ring Black132 X 5NBR-Buna70 Shore ANee56 icon
O-Ring 980x10 NBR-BUNA - 70 Shore A - Black - ORSV2-980x10-NBR69 O-ring Black980 X 10NBR-Buna70 Shore ANee54 icon
O-Ring 35.1x1.6 NBR-BUNA - 70 Shore A - Black - ORSV2-35.1x1.6-NBR69 O-ring Black35.1 X 1.6NBR-Buna70 Shore ANee60 icon
O-Ring 95x12 NBR-BUNA - 70 Shore A - Black - ORSV2-95x12-NBR69 O-ring Black95 X 12NBR-Buna70 Shore ANee52 icon
O-Ring 320x6 NBR-BUNA - 70 Shore A - Black - ORSV2-320x6-NBR69 O-ring Black320 X 6NBR-Buna70 Shore ANee52 icon
O-Ring 10.1x1.7 NBR-BUNA - 70 Shore A - Black - ORSV2-10.1x1.7-NBR69 O-ring Black10.1 X 1.7NBR-Buna70 Shore ANee50 icon
O-Ring 32x6 NBR-BUNA - 70 Shore A - Black - ORSV2-32x6-NBR69 O-ring Black32 X 6NBR-Buna70 Shore ANee51 icon
O-Ring 49x3 NBR-BUNA - 70 Shore A - Black - ORSV2-49x3-NBR69 O-ring Black49 X 3NBR-Buna70 Shore ANee55 icon
O-Ring 453x7 NBR-BUNA - 70 Shore A - Black - ORSV2-453x7-NBR69 O-ring Black453 X 7NBR-Buna70 Shore ANee51 icon
O-Ring 200x7 NBR-BUNA - 70 Shore A - Black - ORSV2-200x7-NBR69 O-ring Black200 X 7NBR-Buna70 Shore ANee50 icon
O-Ring 148x2 NBR-BUNA - 70 Shore A - Black - ORSV2-148x2-NBR69 O-ring Black148 X 2NBR-Buna70 Shore ANee55 icon
O-Ring 90x6 NBR-BUNA - 70 Shore A - Black - ORSV2-90x6-NBR69 O-ring Black90 X 6NBR-Buna70 Shore ANee53 icon
O-Ring 99x6 NBR-BUNA - 70 Shore A - Black - ORSV2-99x6-NBR69 O-ring Black99 X 6NBR-Buna70 Shore ANee50 icon
O-Ring 99x3 NBR-BUNA - 70 Shore A - Black - ORSV2-99x3-NBR69 O-ring Black99 X 3NBR-Buna70 Shore ANee59 icon
O-Ring 53x4 NBR-BUNA - 70 Shore A - Black - ORSV2-53x4-NBR69 O-ring Black53 X 4NBR-Buna70 Shore ANee54 icon
O-Ring 54.2x5.7 NBR-BUNA - 70 Shore A - Black - ORSV2-54.2x5.7-NBR69 O-ring Black54.2 X 5.7NBR-Buna70 Shore ANee55 icon
O-Ring 125x15 NBR-BUNA - 70 Shore A - Black - ORSV2-125x15-NBR69 O-ring Black125 X 15NBR-Buna70 Shore ANee57 icon
O-Ring 294.5x6 NBR-BUNA - 70 Shore A - Black - ORSV2-294.5x6-NBR69 O-ring Black294.5 X 6NBR-Buna70 Shore ANee59 icon
O-Ring 525x12 NBR-BUNA - 70 Shore A - Black - ORSV2-525x12-NBR69 O-ring Black525 X 12NBR-Buna70 Shore ANee56 icon
O-Ring 38x4 NBR-BUNA - 70 Shore A - Black - ORSV2-38x4-NBR69 O-ring Black38 X 4NBR-Buna70 Shore ANee56 icon
O-Ring 600x8 NBR-BUNA - 70 Shore A - Grey KTW - ORSV2-600x8-NBR69 O-ring Grey600 X 8NBR-Buna70 Shore AJa55 icon
O-Ring 22x1 NBR-BUNA - 70 Shore A - Black - ORSV2-22x1-NBR69 O-ring Black22 X 1NBR-Buna70 Shore ANee59 icon
O-Ring 21x2 NBR-BUNA - 70 Shore A - Black KTW - ORSV2-21x2-NBR69 O-ring Black21 X 2NBR-Buna70 Shore AJa54 icon
O-Ring 430x16 NBR-BUNA - 70 Shore A - Black - ORSV2-430x16-NBR69 O-ring Black430 X 16NBR-Buna70 Shore ANee54 icon
O-Ring 37.5x1.5 NBR-BUNA - 70 Shore A - Black - ORSV2-37.5x1.5-NBR69 O-ring Black37.5 X 1.5NBR-Buna70 Shore ANee54 icon
O-Ring 114x14 NBR-BUNA - 70 Shore A - Black - ORSV2-114x14-NBR69 O-ring Black114 X 14NBR-Buna70 Shore ANee51 icon
O-Ring 264x14 NBR-BUNA - 70 Shore A - Black - ORSV2-264x14-NBR69 O-ring Black264 X 14NBR-Buna70 Shore ANee50 icon
O-Ring 16.36x2.21 NBR-BUNA - 70 Shore A - Black - ORSV2-16.36x2.21-NBR69 O-ring Black16.36 X 2.21NBR-Buna70 Shore ANee53 icon
O-Ring 1.42x1.78 NBR-BUNA - 70 Shore A - Black - ORSV2-1.42x1.78-NBR69 O-ring Black1.42 X 1.78NBR-Buna78 Shore ANee57 icon
O-Ring 128x7 NBR-BUNA - 70 Shore A - Black - ORSV2-128x7-NBR69 O-ring Black128 X 7NBR-Buna70 Shore ANee59 icon