568-044 GREEN HNBR (HSN) 70 ORINGS

Part number HS70044 is an AS568-044 green HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring built to an inside diameter of 3.739 in (94.97 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 3.879 in (98.53 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

The compound resists modern refrigerants, ozone and weathering, and heat and oxidation. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is valued for improved ozone and weathering resistance over standard nitrile, strong resistance to rapid gas decompression. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). It should not be specified for service in esters or chlorinated hydrocarbons.

You will find this material specified across automotive air conditioning, heavy-duty powertrain, and commercial refrigeration.

This item is sold individually under part number HS70044. Nominal inside diameter is listed as 3 3/4 inch. Review your operating media and conditions against this specification before installation.