OSK™ Automotive A/C 200 Piece HNBR O-Ring Kit


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OSK™ Automotive A/C O-Ring Kit

Our Automotive Green A/C HNBR Kit consists of 200 assorted O-Rings in 12 commonly-used sizes.

200pc O-Ring Kit Includes the Following Popular AS568 Sizes:

  • 20pc -008 O-Rings 3/16"ID X 5/16"OD X 1/16"CS
  • 20pc -010 O-Rings 1/4"ID X 3/8"OD X 1/16"CS
  • 20pc - 011 O-RIngs 5/16"ID X 7/16"OD X 1/16"CS   
  • 20pc -012 O-Rings 3/8"ID X 1/2"OD X 1/16"CS
  • 20pc -013 O-Rings 7/16"ID X 9/16"OD X 1/16"CS
  • 20pc -014 O-Rings 1/2"ID X 5/8"OD X 1/16"CS
  • 15pc -015 O-Rings  9/16"ID X 11/16"OD X 1/16"CS
  • 15pc -017 O-Rings 11/16"ID X 13/16"OD X 1/16"CS
  • 15pc -111 O-Rings 7/16"ID X 5/8"OD X 3/32"CS
  • 15pc -116 O-Rings 3/4"ID X 15/16"OD X 3/32"CS
  • 10pc -118 O-Rings 7/8"ID X 1-1/16"OD X 3/32"CS
  • 10pc -211 O-Rings 13/16"ID X 1-1/16"OD X 1/8"CS

Some years ago, for environmental reasons, the U.S. government joined a global consortium mandating the replacement of all CFC type refrigerants in favor of those with lower ozone depleting properties. This new requirement was the basis for the introduction of the R-134a refrigerant into the automotive industry. 

The material used to produce this kit, is a green colored, highly saturated nitrile or HNBR.  HNBR offers excellent resistance to R-134a refrigerant, elevated operating temperatures, as well as resistance to the synthetic oils used as lubrication within the compressor.     

Highly Saturated Nitrile Butadiene Rubber

HNBR, or HSN, is a hydrogenated NBR for increased saturation of the butadiene segment of the main carbon polymer chain. This gives HNBR better thermal stability, greater tensile strength, greater wear and extrusion resistance, increased resistance to ozone and oxygen, and broader chemical resistance compared to a standard NBR. HNBR It is often seen in automotive air conditioning applications due to its excellent resistance to R-134a refrigerants. With minimal degredation, HNBR may be used from -40°F to 300°F  for extended periods.

HNBR / HSN Recommended uses:

  • Petroleum oils and fluids.
  • Automotive refrigerants (R134-a)
  • Hydrogen sulfide (H2S) or sour gas
  • Carbon Dioxide (CO2)
  • Gasoline
  • Hydraulic fluids
  • L.P. gases
  • Silicone greases and oils
  • Di-ester base lubricants (MIL-L-7808).
  • Ethylene glycol base fluids (Hydrolubes)

Not recommended for:

  • Halogenated hydrocarbons (carbon tetrachloride, trichloroethylene)
  • Nitro hydrocarbons (nitrobenzene, aniline)
  • Phosphate ester hydraulic fluids (Skydrol, Fyrquel, Pydraul).
  • Ketones (MEK, acetone)
  • Sunlight, UV
  • Weather
  • Strong Acids
  • Automotive brake fluid

Compound Info:

  • Highly Saturated Nitrile Butadiene Rubber Peroxid Cured
  • Color: Green
  • Duro: 70
  • FDA: No
  • ASTM D2000 M4DH716 A26 B36 EO16 EO36 F17 Z1 Z2 (Z1=Green Color ,  Z2=Automotive A/C Refrigerant Resistance)

Operating temperature: -40° to +300°F

*All manufacturer’s names, part numbers and descriptions are used for reference purposes only. OSK™ O-Ring Service Kits, The O-Rings Store LLC is not sponsored by or affiliated with any brand listed. OSK™ Seals and Kits are assembled with high performance seals and parts.

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Phone 208-413-6377 - Fax 208-413-6719