No image available
No image available
Your request is being processed.

Nitrile 70 Durometer O-Ring, General Purpose (N0674-70)

Parker's nitrile rubber (NBR) O-rings are very compatible with oils and gases.

Parker's nitrile rubber (NBR) O-rings are very compatible with oils and gases.

Use our configurator to build the right part for your application.


Parker's Nitrile rubber (NBR) is the general term for acrylonitrile butadiene copolymer. The acrylonitrile content of nitrile sealing compounds varies considerably (18% to 50%) and influences the physical properties of the finished material. The higher the acrylonitrile content, the better the resistance to oil and fuel. At the same time, elasticity and resistance to compression set is adversely affected. In view of these opposing realities, a compromise is often drawn, and a medium acrylonitrile content selected. NBR has good mechanical properties when compared with other elastomers and high wear resistance. NBR is not resistant to weathering and ozone.

• Heat resistance
• Up to 100°C (212°F) with shorter life @ 121°C (250°F)
• Cold flexibility
• Depending on individual compound, between -34°C and -57°C (-30°F and -70°F)
• Chemical resistance
• Aliphatic hydrocarbons (propane, butane, petroleum oil, mineral oil and grease, diesel fuel, fuel oils) vegetable and mineral oils and greases
• HFA, HFB and HFC hydraulic fluids
• Dilute acids, alkali and salt solutions at low temperatures
• Water (special compounds up to 100°C) (212°F)
• Used for general purpose, MIL-G-21569 CL 1, UL Listed

*Custom sizes and coatings/markings are available upon request. Contact Parker O-Ring Division at 859-269-2351 for design and pricing assistance.


Performance Characteristics
Inside Diameter (inch) 0.029 to 25.94
Width (inch) 0.04 to 0.275
Polymer Family Acrylonitrile-Butadiene Nitrile (NBR, XNBR)
Nominal Hardness Range 70
Nominal Hardness 70
Thermal Application (F) Standard (-30F to 250F)
Minimum Working Temperature (F) -30
Maximum Working Temperature (F) 250
Fluid Compatibility Oils
Markets General
Certifications UL, MIL/Aero
Meets Certifications UL-Fire, UL-GasAlc, UL-MPSGas, UL-NatGas, UL-FuelOil, UL-HtdFuelOil, UL-Ammonia, UL-DryChem, MIL-G-21569B Class I
Region of Origin North America
Internally Lubed No
Color Black


Contact Us

O-Ring Division

2360 Palumbo Drive



United States


Ph:859 269 2351

Fax:859 335 5128