568-437 GREEN HNBR (HSN) 70 ORINGS

The HS70437 is an AS568-437 green HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 5.975 in (151.77 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 6.525 in (165.74 mm). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

The compound resists heat and oxidation, modern refrigerants, and sour gas and amine inhibitors. HNBR (Hydrogenated Nitrile) is specified for improved ozone and weathering resistance over standard nitrile, excellent abrasion and tear strength. Rated temperature range runs from -40°F (-40°C) to 325°F (162.8°C) in continuous service. It is not the right choice where strong oxidizing acids or chlorinated hydrocarbons are present.

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

Stocked as HS70437 and sold individually. Nominal inside diameter is listed as 6 inch. Check the compound against your process media, pressure and temperature before committing to a design.