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.

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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 14x1,5 NBR-BUNA - 70 Shore A - Black - ORSV2-14x1,5-NBR69 O-ring schwarz0 icon
O-Ring 72x5 NBR-BUNA - 70 Shore A - Black - ORSV2-72x5-NBR69 O-ring schwarz0 icon
O-Ring 20x1,3 NBR-BUNA - 70 Shore A - Black - ORSV2-20x1,3-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 19,5x2,5 NBR-BUNA - 70 Shore A - Black - ORSV2-19,5x2,4-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 56x2 NBR-BUNA - 70 Shore A - Black - ORSV2-56x2-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 262x4 NBR-BUNA - 70 Shore A - Black - ORSV2-262x4-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 145x25 NBR-BUNA - 70 Shore A - Black - ORSV2-145x25-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 164,47x5,34 NBR-BUNA - 70 Shore A - Black - ORSV2-164,47x5,33-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 592x8 NBR-BUNA - 70 Shore A - Black - ORSV2-592x8-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 101,32x1,78 NBR-BUNA - 70 Shore A - Black - ORSV2-101,32x1,78-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 132x5 NBR-BUNA - 70 Shore A - Black - ORSV2-132x5-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 980x10 NBR-BUNA - 70 Shore A - Black - ORSV2-980x10-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 35,1x1,6 NBR-BUNA - 70 Shore A - Black - ORSV2-35,1x1,6-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 95x12 NBR-BUNA - 70 Shore A - Black - ORSV2-95x12-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 320x6 NBR-BUNA - 70 Shore A - Black - ORSV2-320x6-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 10,1x1,7 NBR-BUNA - 70 Shore A - Black - ORSV2-10,1x1,7-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 32x6 NBR-BUNA - 70 Shore A - Black - ORSV2-32x6-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 49x3 NBR-BUNA - 70 Shore A - Black - ORSV2-49x3-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 453x7 NBR-BUNA - 70 Shore A - Black - ORSV2-453x7-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 200x7 NBR-BUNA - 70 Shore A - Black - ORSV2-200x7-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 148x2 NBR-BUNA - 70 Shore A - Black - ORSV2-148x2-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 90x6 NBR-BUNA - 70 Shore A - Black - ORSV2-90x6-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 99x6 NBR-BUNA - 70 Shore A - Black - ORSV2-99x6-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 99x3 NBR-BUNA - 70 Shore A - Black - ORSV2-99x3-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 53x4 NBR-BUNA - 70 Shore A - Black - ORSV2-53x4-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 54,2x5,7 NBR-BUNA - 70 Shore A - Black - ORSV2-54,2x5,7-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 125x15 NBR-BUNA - 70 Shore A - Black - ORSV2-125x15-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 294,5x6 NBR-BUNA - 70 Shore A - Black - ORSV2-294,5x6-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 525x12 NBR-BUNA - 70 Shore A - Black - ORSV2-525x12-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 38x4 NBR-BUNA - 70 Shore A - Black - ORSV2-38x4-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 600x8 NBR-BUNA - 70 Shore A - Grey KTW - ORSV2-600x8-NBR69 O-ring GrauKTW70 Shore A0 icon
O-Ring 22x1 NBR-BUNA - 70 Shore A - Black - ORSV2-22x1-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 21x2 NBR-BUNA - 70 Shore A - Black KTW - ORSV2-21x2-NBR69 O-ring schwarzKTW70 Shore A0 icon
O-Ring 430x16 NBR-BUNA - 70 Shore A - Black - ORSV2-430x16-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 37,5x1,5 NBR-BUNA - 70 Shore A - Black - ORSV2-37,5x1,5-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 114x14 NBR-BUNA - 70 Shore A - Black - ORSV2-114x14-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 264x14 NBR-BUNA - 70 Shore A - Black - ORSV2-264x14-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 16,36x2,21 NBR-BUNA - 70 Shore A - Black - ORSV2-16,36x2,21-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 1,42x1,78 NBR-BUNA - 70 Shore A - Black - ORSV2-1,42x1,78-NBR69 O-ring schwarz-70 Shore A0 icon
O-Ring 128x7 NBR-BUNA - 70 Shore A - Black - ORSV2-128x7-NBR69 O-ring schwarz-70 Shore A0 icon