NBR O-rings 50 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 50 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 50 Shore A made from NBR, please send us a Direct Enquiry. Together we can discuss the specifications and find the right product for you.

509 products
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ProductDimensionsMaterialHardness (Shore A)CertificationStock
O-Ring 150x4 NBR-BUNA 50 Shore A - Black - ORSV2-150x4-NBR49 O-ring Black150 mm x 4 mmNBR-Buna50 Shore ANee60 icon
O-Ring 183.52x5.33 NBR-BUNA 55 Shore A - Black - ORSV2-183.52x5.33-NBR54 O-ring Black183.52 mm x Goedefleibiliteitbijlagetemperaturen mmNBR-Buna50 Shore ANee50 icon
O-Ring 960x10 NBR-BUNA 55 Shore A - Black - ORSV2-960x10-NBR54 O-ring Black960 mm x 10 mmNBR-Buna50 Shore ANee57 icon
O-Ring 7.52x3.53 NBR-BUNA 50 Shore A - Black - ses-302201 O-ring Black7.52 mm x 3.53 mmNBR-Buna50 Shore ANee60 icon
O-Ring 22x4 NBR-BUNA 50 Shore A - Black - ses-500290 O-ring Black22 mm x 4 mmNBR-Buna50 Shore ANee57 icon
O-Ring 56x4 NBR-BUNA 55 Shore A - Black - ORSV2-56x4-NBR54 O-ring Black56 mm x 4 mmNBR-Buna50 Shore ANee51 icon
O-Ring 72.62x3.53 NBR-BUNA 55 Shore A - Black - ORSV2-72.62x3.53-NBR54 O-ring Black72.62 mm x  mmNBR-Buna50 Shore ANee50 icon
O-Ring 72x4 NBR-BUNA 55 Shore A - Black - ORSV2-72x4-NBR54 O-ring Black72 mm x 4 mmNBR-Buna50 Shore ANee54 icon
O-Ring 6.75x1.78 NBR-BUNA 55 Shore A - Black - ORSV2-6.75x1.78-NBR54 O-ring Black6.75 mm x  mmNBR-Buna50 Shore ANee60 icon
O-Ring 654x6 NBR-BUNA 55 Shore A - Black - ORSV2-654x6-NBR54 O-ring Black654 mm x 6 mmNBR-Buna50 Shore ANee58 icon
O-Ring 142.47x3.53 NBR-BUNA 55 Shore A - Black - ORSV2-142.47x3.53-NBR54 O-ring Black142.47 mm x  mmNBR-Buna50 Shore ANee51 icon
O-Ring 107.55x3.53 NBR-BUNA 55 Shore A - Black - ORSV2-107.55x3.53-NBR54 O-ring Black107.55 mm x  mmNBR-Buna50 Shore ANee56 icon
O-Ring 3.63x2.62 NBR-BUNA 50 Shore A - Black - ses-475073 O-ring Black3.63 mm x 2.62 mmNBR-Buna50 Shore ANee58 icon
O-Ring 70x3 NBR-BUNA 55 Shore A - Grey KTW - ORSV2-70x3-NBR54 O-ring Grey70 mm x 3 mmNBR-Buna50 Shore AJa53 icon
O-Ring 150x5 NBR-BUNA 50 Shore A - Black - ORSV2-150x5-NBR49 O-ring Black150 mm x 5 mmNBR-Buna50 Shore ANee57 icon
O-Ring 260x8 NBR-BUNA 55 Shore A - Red - ses-300920 O-ring Red260 mm x 8 mmNBR-Buna50 Shore ANee52 icon
O-Ring 71x4 NBR-BUNA 55 Shore A - Black - ORSV2-71x4-NBR54 O-ring Black71 mm x 4 mmNBR-Buna50 Shore ANee56 icon
O-Ring 36.5x9 NBR-BUNA 55 Shore A - Black - ORSV2-36.5x9-NBR54 O-ring Black36 mm x 9 mmNBR-Buna50 Shore ANee58 icon
O-Ring 117x4 NBR-BUNA 50 Shore A - Black - ORSV2-117x4-NBR49 O-ring Black117 mm x 4 mmNBR-Buna50 Shore ANee50 icon
O-Ring 6.3x4 NBR-BUNA 55 Shore A - Black - ORSV2-6.3x4-NBR54 O-ring Black6 mm x 4 mmNBR-Buna50 Shore ANee60 icon
O-Ring 205x5 NBR-BUNA 45 Shore A - Black - ORSV2-205x5-NBR44 O-ring Black205 mm x 5 mmNBR-Buna50 Shore ANee59 icon
O-Ring 95x6 NBR-BUNA 45 Shore A - Black - ORSV2-95x6-NBR44 O-ring Black95 mm x 6 mmNBR-Buna50 Shore ANee57 icon
O-Ring 37.1x1.6 NBR-BUNA 55 Shore A - Black - ORSV2-37.1x1.6-NBR54 O-ring Black37.1 mm x  mmNBR-Buna50 Shore ANee60 icon
O-Ring 503x5 NBR-BUNA 55 Shore A - Black - ORSV2-503x5-NBR54 O-ring Black503 mm x 5 mmNBR-Buna50 Shore ANee58 icon
O-Ring 16.9x2.7 NBR-BUNA 55 Shore A - Black - ORSV2-16.9x2.7-NBR54 O-ring Black16.9 mm x  mmNBR-Buna50 Shore ANee58 icon
O-Ring 630x10 NBR-BUNA 55 Shore A - Black - ORSV2-630x10-NBR54 O-ring Black630 mm x 10 mmNBR-Buna50 Shore ANee58 icon
O-Ring 353x10 NBR-BUNA 55 Shore A - Black - ORSV2-353x10-NBR54 O-ring Black353 mm x 10 mmNBR-Buna50 Shore ANee59 icon
O-Ring 33.85x5.33 NBR-BUNA 45 Shore A - Black - ses-476643 O-ring Black33.85 mm x 5.33 mmNBR-Buna50 Shore ANee57 icon
O-Ring 145x6 NBR-BUNA 55 Shore A - Black - ORSV2-145x6-NBR54 O-ring Black145 mm x 6 mmNBR-Buna50 Shore ANee52 icon
O-Ring 9.25x1.78 NBR-BUNA 50 Shore A - Black - ORSV2-9.25x1.78-NBR49 O-ring Black9.25 mm x  mmNBR-Buna50 Shore ANee56 icon
O-Ring 30x2.5 NBR-BUNA 55 Shore A - Black - ORSV2-30x2.5-NBR54 O-ring Black30 mm x 2 mmNBR-Buna50 Shore ANee53 icon
O-Ring 110x6 NBR-BUNA 55 Shore A - Black - ORSV2-110x6-NBR54 O-ring Black110 mm x 6 mmNBR-Buna50 Shore ANee55 icon
O-Ring 125x10 NBR-BUNA 55 Shore A - Black - ORSV2-125x10-NBR54 O-ring Black125 mm x 10 mmNBR-Buna50 Shore ANee59 icon
O-Ring 155x4.5 NBR-BUNA 55 Shore A - Black - ses-320217 O-ring Black155 mm x 4.5 mmNBR-Buna50 Shore ANee59 icon
O-Ring 8x2.6 NBR-BUNA 50 Shore A - Black - ORSV2-8x2.5-NBR49 O-ring Black82 mm x 2 mmNBR-Buna50 Shore ANee55 icon
O-Ring 41.2x5.7 NBR-BUNA 55 Shore A - Black - ORSV2-41.2x5.7-NBR54 O-ring Black41.2 mm x  mmNBR-Buna50 Shore ANee54 icon
O-Ring 94x8 NBR-BUNA 55 Shore A - Black - ORSV2-94x8-NBR54 O-ring Black94 mm x 8 mmNBR-Buna50 Shore ANee57 icon
O-Ring 58x2 NBR-BUNA 55 Shore A - Black - ORSV2-58x2-NBR54 O-ring Black58 mm x 2 mmNBR-Buna50 Shore ANee56 icon
O-Ring 60x6 NBR-BUNA 55 Shore A - Black - ORSV2-60x6-NBR54 O-ring Black60 mm x 6 mmNBR-Buna50 Shore ANee53 icon
O-Ring 123x2.5 NBR-BUNA 55 Shore A - Black - ORSV2-123x2.5-NBR54 O-ring Black123 mm x 2 mmNBR-Buna50 Shore ANee58 icon