568-220 GREEN HNBR (HSN) 70 ORINGS

Part number HS70220 is an AS568-220 green HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring built to an inside diameter of 1.359 in (34.52 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 1.637 in (41.58 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.

As a material, HNBR (Hydrogenated Nitrile) is widely chosen for improved ozone and weathering resistance over standard nitrile, strong resistance to rapid gas decompression. The compound resists modern refrigerants, heat and oxidation, and ozone and weathering. Rated temperature range runs from -40°F (-40°C) to 325°F (162.8°C) in continuous service. It should not be specified for service in strong oxidizing acids or chlorinated hydrocarbons.

Maintenance and OEM teams specify it across engine timing systems, automotive air conditioning, and heavy-duty powertrain.

Reference part number HS70220 when ordering; the item is sold individually. Nominal inside diameter is listed as 1 3/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.