568-154 GREEN HNBR (HSN) 70 ORINGS

This o-ring is supplied in AS568-154 green HNBR (Hydrogenated Nitrile) 70 Shore A built to an inside diameter of 3.737 in (94.92 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 3.943 in (100.15 mm), catalogued under part number HS70154. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

The material holds up against modern refrigerants, ozone and weathering, and petroleum oils and fuels. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is valued for strong resistance to rapid gas decompression, long service life in refrigerant and oilfield duty. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C). Exposure to ketones or strong oxidizing acids will shorten service life.

Common environments for this compound include automotive air conditioning, commercial refrigeration, and heavy-duty powertrain.

Reference part number HS70154 when ordering; the item is sold individually. Nominal inside diameter is listed as 3 3/4 inch. Review your operating media and conditions against this specification before installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.