NBR O-ring 70 Shore A

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	Dimensions	Material	Hardness (Shore A)	Certification

O-ring Black	591 mm x 15 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	154 mm x 4 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	208 mm x 5 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	361 mm x 4 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	104.38 mm x	NBR-Buna	70 Shore A	Nee
O-ring Black	413 mm x 7 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	276 mm x 5 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	276 mm x 7 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	340 mm x 10 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	48 mm x 3 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	1301 mm x 8 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	12.2 mm x	NBR-Buna	70 Shore A	Nee
O-ring Black	27.9 mm x	NBR-Buna	70 Shore A	Nee
O-ring Black	11.9 mm x	NBR-Buna	70 Shore A	Nee
O-ring Black	276 mm x 8 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	6.07 mm x	NBR-Buna	78 Shore A	Nee
O-ring Black	135.10 mm x	NBR-Buna	70 Shore A	Nee
O-ring Black	340 mm x 7 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	320 mm x 25 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	247 mm x 6 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	39 mm x 7 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	34 mm x 8 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	259 mm x 4 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	150 mm x 4 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	18 mm x 4 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	651 mm x 8 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	159 mm x 6 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	155 mm x 8 mm	NBR-Buna	70 Shore A	Nee
O-ring Gray	315 mm x 6 mm	NBR-Buna	70 Shore A	Ja
O-ring Black	5 mm x 4 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	1001 mm x 8 mm	NBR-Buna	70 Shore A	Nee
O-ring Gray	42 mm x 16 mm	NBR-Buna	70 Shore A	Ja
O-ring Black	73 mm x 10 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	339 mm x 4 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	26 mm x 4 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	15 mm x 8 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	342 mm x 3 mm	NBR-Buna	70 Shore A	Ja
O-ring Black	103 mm x 6 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	476 mm x 10 mm	NBR-Buna	70 Shore A	Nee
O-ring Black	177 mm x 4 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.