NBR O-rings 90 Shore A

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	Dimensions	Material	Hardness (Shore A)	Certification

O-ring Black	170 mm x 2 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	90 mm x 5 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	65.2 mm x	NBR-Buna	90 Shore A	Nee
O-ring Black	32 mm x 8 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	197 mm x 4 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	98 mm x 4 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	229 mm x 6 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	23.48 mm x	NBR-Buna	95 Shore A	Nee
O-ring Black	69 mm x 3 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	279.3 mm x	NBR-Buna	90 Shore A	Nee
O-ring Black	339 mm x 6 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	346 mm x 10 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	1.42 mm x	NBR-Buna	90 Shore A	Nee
O-ring Black	801 mm x 7 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	118 mm x 6 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	389 mm x 6 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	12 mm x 5 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	421 mm x 10 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	2.57 mm x	NBR-Buna	78 Shore A	Nee
O-ring Black	21 mm x 1 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	100.98 mm x	NBR-Buna	90 Shore A	Nee
O-ring Gray	12.38 mm x	NBR-Buna	62 Shore A	Ja
O-ring Black	235 mm x 5 mm	NBR-Buna	90 Shore A	Ja
O-ring Black	380 mm x 8 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	107.55 mm x	NBR-Buna	90 Shore A	Nee
O-ring Black	47 mm x 10 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	235 mm x 7 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	110 mm x 6 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	276 mm x 3 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	209.4 mm x	NBR-Buna	90 Shore A	Nee
O-ring Black	520 mm x 6 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	146 mm x 4 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	85.10 mm x	NBR-Buna	90 Shore A	Nee
O-ring Black	581 mm x 8 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	72 mm x 4 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	32 mm x 2 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	461 mm x 8 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	32 mm x 4 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	179 mm x 10 mm	NBR-Buna	90 Shore A	Nee
O-ring Black	100 mm x 3 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.