NBR O-rings 90 Shore A

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	Dimensions	Material	Hardness (Shore A)	Certification

O-ring Black	27.8 mm x 3.5 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	208 mm x 3 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	244.2 mm x 8.4 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	328 mm x 10 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	728 mm x 3.5 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	419 mm x 8 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	106 mm x 5.33 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	459 mm x 8.4 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	628 mm x 4 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	654.4 mm x 5.7 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	691 mm x 6 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	831 mm x 8 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	903 mm x 9 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	965 mm x 5.33 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	3 mm x 2.3 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	4.7 mm x 1.4 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	15.36 mm x 1.2 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	1.3 mm x 2.4 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	3.81 mm x 1.88 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	6.1 mm x 1.6 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	16.80 mm x 1 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	9.5 mm x 6 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	13 mm x 2.7 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	14 mm x 1.02 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	36.84 mm x 4.32 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	47.6 mm x 1.7 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	61.6 mm x 2.65 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	623 mm x 3 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	556 mm x 2.62 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	1.25 mm x 1 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	3.7 mm x 1.3 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	15 mm x 4 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	17 mm x 1.35 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	10.70 mm x 0.79 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	23.95 mm x 3.53 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	13 mm x 2.8 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	42.3 mm x 1.8 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	37.48 mm x 5.33 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	48 mm x 1.7 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	53.20 mm x 3.53 mm	NBR-Buna	90 Shore A	Nee

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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.