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Hydrogenated Nitrile 80 Durometer O-Ring High Temp Hydraulics (KB162-80)

Parker's hydrogenated nitrile (HNBR, HSN) O-rings are very compatible with oils and gases.

Parker's hydrogenated nitrile (HNBR, HSN) O-rings are very compatible with oils and gases.

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


Parker's hydrogenated nitrile (HNBR, HSN) is a synthetic polymer that results from the hydrogenation of nitrile rubber (NBR). Superior mechanical characteristics, particularly high strength, helps reduce extrusion and wear.

• Heat resistance
• Up to 150°C (300°F)
• Cold flexibility
• Down to approximately -48°C (-55°F)
• Chemical resistance
• Aliphatic hydrocarbons
• Vegetable and animal fats and oils
• HFA, HFB and HFC hydraulic fluids
• Dilute acids, bases and salt solutions at moderate temperatures
• Water and steam up to 149°C (300°F)
• Ozone, aging and weathering

Not compatible with:
• Chlorinated hydrocarbons
• Polar solvents (ketones, esters and ethers)
• Strong acids
• Used for Oilfield, High Temperature Hydraulics

*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 Hydrogenated Nitrile (HNBR, HSN)
Trade Name 21378
Nominal Hardness Range >70
Nominal Hardness 80
Thermal Application (F) High temperature (260F-400F)
Minimum Working Temperature (F) -25
Maximum Working Temperature (F) 300
Fluid Compatibility Oils
Markets General
Certifications None
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