NBR O-rings 90 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 90 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 90 Shore A made from NBR, please send us a Direct Enquiry. Together we can discuss the specifications and find the right product for you.

25945 products
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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 248x3 NBR-BUNA - 90 Shore A - Black - ORSV2-248x3-NBR89 O-ring Black248 mm x 3 mmNBR-Buna90 Shore ANee56 icon
O-Ring 265x4 NBR-BUNA - 90 Shore A - Black - ORSV2-265x4-NBR89 O-ring Black265 mm x 4 mmNBR-Buna90 Shore ANee55 icon
O-Ring 280x6 NBR-BUNA - 90 Shore A - Black - ORSV2-280x6-NBR89 O-ring Black280 mm x 6 mmNBR-Buna90 Shore ANee52 icon
O-Ring 292x4 NBR-BUNA - 90 Shore A - Black - ORSV2-292x4-NBR89 O-ring Black292 mm x 4 mmNBR-Buna90 Shore ANee53 icon
O-Ring 1135x10 NBR-BUNA - 90 Shore A - Black - ORSV2-1135x10-NBR89 O-ring Black1135 mm x 10 mmNBR-Buna90 Shore ANee59 icon
O-Ring 12.29x3.53 NBR-BUNA - 90 Shore A - Black - ORSV2-12.29x3.53-NBR89 O-ring Black12.29 mm x  mmNBR-Buna90 Shore ANee54 icon
O-Ring 93x6 NBR-BUNA - 90 Shore A - Black - ORSV2-93x6-NBR89 O-ring Black93 mm x 6 mmNBR-Buna90 Shore ANee58 icon
O-Ring 244x7 NBR-BUNA - 90 Shore A - Black - ORSV2-244x7-NBR89 O-ring Black244 mm x 7 mmNBR-Buna90 Shore ANee50 icon
O-Ring 16.56x1.78 NBR-BUNA - 90 Shore A - Black - ORSV2-16.56x1.78-NBR89 O-ring Black16.56 mm x  mmNBR-Buna78 Shore ANee61 icon
O-Ring 23.6x3.5 NBR-BUNA - 90 Shore A - Black - ORSV2-23.6x3.5-NBR89 O-ring Black23.6 mm x  mmNBR-Buna90 Shore ANee56 icon
O-Ring 291.47x6.99 NBR-BUNA - 90 Shore A - Black - ORSV2-291.47x6.99-NBR89 O-ring Black291.47 mm x  mmNBR-Buna99 Shore ANee56 icon
O-Ring 315x4 NBR-BUNA - 90 Shore A - Black - ORSV2-315x4-NBR89 O-ring Black315 mm x 4 mmNBR-Buna90 Shore ANee50 icon
O-Ring 330x10 NBR-BUNA - 90 Shore A - Grey KTW - ORSV2-330x10-NBR89 O-ring Grey330 mm x 10 mmNBR-Buna90 Shore AJa54 icon
O-Ring 235x10 NBR-BUNA - 90 Shore A - Grey KTW - ORSV2-235x10-NBR89 O-ring Grey235 mm x 10 mmNBR-Buna90 Shore AJa58 icon
O-Ring 404x3 NBR-BUNA - 90 Shore A - Black - ORSV2-404x3-NBR89 O-ring Black404 mm x 3 mmNBR-Buna90 Shore ANee53 icon
O-Ring 99.2x5.7 NBR-BUNA - 90 Shore A - Black - ORSV2-99.2x5.7-NBR89 O-ring Black99.2 mm x  mmNBR-Buna90 Shore ANee59 icon
O-Ring 87x5 NBR-BUNA - 90 Shore A - Black - ORSV2-87x5-NBR89 O-ring Black87 mm x 5 mmNBR-Buna90 Shore ANee51 icon
O-Ring 27.4x3.53 NBR-BUNA - 90 Shore A - Black - ORSV2-27.4x3.53-NBR89 O-ring Black27.4 mm x  mmNBR-Buna90 Shore ANee53 icon
O-Ring 42.5x3 NBR-BUNA - 90 Shore A - Black - ORSV2-42.5x3-NBR89 O-ring Black42 mm x 3 mmNBR-Buna90 Shore ANee50 icon
O-Ring 14x3.5 NBR-BUNA - 90 Shore A - Black - ORSV2-14x3.5-NBR89 O-ring Black14 mm x 3 mmNBR-Buna90 Shore ANee1432 icon
O-Ring 41x2 NBR-BUNA - 90 Shore A - Black - ORSV2-41x2-NBR89 O-ring Black41 mm x 2 mmNBR-Buna90 Shore ANee56 icon
O-Ring 540x8 NBR-BUNA - 90 Shore A - Black - ORSV2-540x8-NBR89 O-ring Black540 mm x 8 mmNBR-Buna90 Shore ANee58 icon
O-Ring 11x2 NBR-BUNA - 90 Shore A - Black - ORSV2-11x2-NBR89 O-ring Black11 mm x 2 mmNBR-Buna90 Shore ANee53 icon
O-Ring 250x5 NBR-BUNA - 90 Shore A - Black - ORSV2-250x5-NBR89 O-ring Black250 mm x 5 mmNBR-Buna90 Shore ANee50 icon
O-Ring 288x4 NBR-BUNA - 90 Shore A - Black - ORSV2-288x4-NBR89 O-ring Black288 mm x 4 mmNBR-Buna90 Shore ANee55 icon
O-Ring 56x5 NBR-BUNA - 90 Shore A - Black DVGW-Gasversorgung - ORSV2-56x5-NBR89 O-ring Black565 mm x 5 mmNBR-Buna90 Shore AJa54 icon
O-Ring 16x7 NBR-BUNA - 90 Shore A - Black - ORSV2-16x7-NBR89 O-ring Black16 mm x 7 mmNBR-Buna90 Shore ANee62 icon
O-Ring 920x12 NBR-BUNA - 90 Shore A - Black - ORSV2-920x12-NBR89 O-ring Black920 mm x 12 mmNBR-Buna90 Shore ANee58 icon
O-Ring 100x4 NBR-BUNA - 90 Shore A - Grey KTW - ORSV2-100x4-NBR89 O-ring Grey100 mm x 4 mmNBR-Buna90 Shore AJa60 icon
O-Ring 8x2 NBR-BUNA - 90 Shore A - Black - ORSV2-8x2-NBR89 O-ring Black82 mm x 2 mmNBR-Buna90 Shore ANee52 icon
O-Ring 557.66x6.99 NBR-BUNA - 90 Shore A - Black - ORSV2-557.66x6.99-NBR89 O-ring Black557.66 mm x  mmNBR-Buna99 Shore ANee60 icon
O-Ring 234.32x5.33 NBR-BUNA - 90 Shore A - Black - ORSV2-234.32x5.33-NBR89 O-ring Black234.32 mm x  mmNBR-Buna90 Shore ANee56 icon
O-Ring 270x8 NBR-BUNA - 90 Shore A - Black - ORSV2-270x8-NBR89 O-ring Black270 mm x 8 mmNBR-Buna90 Shore ANee52 icon
O-Ring 350x5 NBR-BUNA - 90 Shore A - Black - ORSV2-350x5-NBR89 O-ring Black350 mm x 5 mmNBR-Buna90 Shore ANee50 icon
O-Ring 4.5x1 NBR-BUNA - 90 Shore A - Black - ORSV2-4.5x1-NBR89 O-ring Black4 mm x 1 mmNBR-Buna90 Shore ANee56 icon
O-Ring 530x10 NBR-BUNA - 90 Shore A - Black - ORSV2-530x10-NBR89 O-ring Black530 mm x 10 mmNBR-Buna90 Shore ANee56 icon
O-Ring 71x3.5 NBR-BUNA - 90 Shore A - Black - ORSV2-71x3.5-NBR89 O-ring Black71 mm x 3 mmNBR-Buna90 Shore ANee54 icon
O-Ring 45x6 NBR-BUNA - 90 Shore A - Black - ORSV2-45x6-NBR89 O-ring Black45 mm x 6 mmNBR-Buna90 Shore ANee50 icon
O-Ring 468.76x6.99 NBR-BUNA - 90 Shore A - Black DVGW-Gasversorgung - ORSV2-468.76x6.99-NBR89 O-ring Black468.76 mm x  mmNBR-Buna99 Shore AJa52 icon
O-Ring 340x8 NBR-BUNA - 90 Shore A - Black - ORSV2-340x8-NBR89 O-ring Black340 mm x 8 mmNBR-Buna90 Shore ANee60 icon