568-444 GREEN HNBR (HSN) 70 ORINGS

Part number HS70444 is an AS568-444 green HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring measuring an inside diameter of 7.725 in (196.22 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 8.275 in (210.19 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Expect good resistance to petroleum oils and fuels, sour gas and amine inhibitors, and heat and oxidation. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) offers excellent abrasion and tear strength, long service life in refrigerant and oilfield duty. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C).

Maintenance and OEM teams specify it across engine timing systems, commercial refrigeration, and heavy-duty powertrain.

HS70444 ships individually. Nominal inside diameter is listed as 7 3/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. For a size or compound outside the standard catalog, APG can quote from a print or sample.