568-161 GREEN HNBR (HSN) 70 ORINGS

This o-ring is supplied in AS568-161 green HNBR (Hydrogenated Nitrile) 70 Shore A built to an inside diameter of 5.487 in (139.37 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 5.693 in (144.6 mm), catalogued under part number HS70161. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

HNBR (Hydrogenated Nitrile) is widely chosen for the oil resistance of nitrile with substantially better heat capability and strong resistance to rapid gas decompression. It resists petroleum oils and fuels, heat and oxidation, and modern refrigerants. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C). It should not be specified for service in esters or strong oxidizing acids.

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

Reference part number HS70161 when ordering; the item is sold individually. Nominal inside diameter is listed as 5 1/2 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.