568-370 HSN90 DURO ORINGS

HSN90370 is an AS568-370 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring measuring an inside diameter of 8.225 in (208.92 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 8.645 in (219.58 mm). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

This material stands up to petroleum oils and fuels, ozone and weathering, and modern refrigerants. 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). It should not be specified for service in ketones or strong oxidizing acids.

Maintenance and OEM teams specify it across automotive air conditioning, oilfield and downhole equipment, and commercial refrigeration.

Order part number HSN90370, sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. For a size or compound outside the standard catalog, APG can quote from a print or sample.