NBR O-ring 70 Shore A

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	Dimensions	Material	Hardness (Shore A)	Certification

O-ring Black	1002 mm x 8 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	18.72 mm x 2.63 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	59.14 mm x 4.27 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	509.40 mm x 5.81 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	6.72 mm x 1.4 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	28.18 mm x 3.48 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	89.29 mm x 1.02 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	193 mm x 3.5 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	346 mm x 5.7 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	506.07 mm x 7 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	784 mm x 9 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	911 mm x 5.7 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	2832.2 mm x 8.99 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	86 mm x 5.5 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	405 mm x 3.5 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	165 mm x 4 mm	NBR-Buna		Nee
O-ring Black	35.2 mm x	NBR-Buna		Nee
O-ring Black	65 mm x 1 mm	NBR-Buna		Nee
O-ring Black	96 mm x 6 mm	NBR-Buna		Nee
O-ring Black	133 mm x 7 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	31 mm x 6 mm	NBR-Buna		Nee
O-ring Black	314 mm x 2.5 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	584 mm x 3 mm	NBR-Buna		Ja
O-ring Black	459 mm x 12 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	94 mm x 2 mm	NBR-Buna		Nee
O-ring Black	678 mm x 3.5 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	880 mm x 3.5 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	1291.3 mm x 6.99 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	82.10 mm x 2 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	741 mm x 5.34 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	8.6 mm x 1.9 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	195 mm x 1 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	713 mm x 5.7 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	105 mm x 2 mm	NBR-Buna		Nee
O-ring Black	306 mm x 5 mm	NBR-Buna		Nee
O-ring Black	56.83 mm x	NBR-Buna	62 Shore A	Nee
O-ring Black	9 mm x 1.8 mm	NBR-Buna		Nee
O-ring Black	75 mm x 2 mm	NBR-Buna		Nee
O-ring Black	34.43 mm x 2.95 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	86.88 mm x 2.62 mm	NBR-Buna	70 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 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.