568-129 GREEN HNBR (HSN) 70 ORINGS

HS70129 is an AS568-129 green HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring built to an inside diameter of 1.549 in (39.34 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.755 in (44.58 mm). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

As a material, HNBR (Hydrogenated Nitrile) is known for improved ozone and weathering resistance over standard nitrile, long service life in refrigerant and oilfield duty. Expect good resistance to modern refrigerants, petroleum oils and fuels, and sour gas and amine inhibitors. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). Verify compatibility before use with strong oxidizing acids or chlorinated hydrocarbons.

Maintenance and OEM teams specify it across heavy-duty powertrain, oilfield and downhole equipment, and commercial refrigeration.

Reference part number HS70129 when ordering; the item is sold individually. Nominal inside diameter is listed as 1 9/16 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.