568-239 HSN90 DURO ORINGS

APG stocks the HSN90239, an AS568-239 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring built to an inside diameter of 3.609 in (91.67 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.887 in (98.73 mm). An o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

The material holds up against petroleum oils and fuels, ozone and weathering, and modern refrigerants. 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. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C). Verify compatibility before use with ketones or esters.

It sees regular use in heavy-duty powertrain, commercial refrigeration, and automotive air conditioning.

This item is sold individually under part number HSN90239. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.