568-372 HSN90 DURO ORINGS

HSN90372 is an AS568-372 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 8.725 in (221.62 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 9.145 in (232.28 mm). In service, this o-ring compresses into its gland to block fluid or gas migration across a joint.

HNBR (Hydrogenated Nitrile) is widely chosen for strong resistance to rapid gas decompression, excellent abrasion and tear strength. This material stands up to modern refrigerants, ozone and weathering, and petroleum oils and fuels. Continuous operating temperature is published at -40°F (-40°C) to 325°F (162.8°C). It should not be specified for service in strong oxidizing acids or chlorinated hydrocarbons.

Maintenance and OEM teams specify it across engine timing systems, oilfield and downhole equipment, and commercial refrigeration.

Order part number HSN90372, sold individually. Nominal inside diameter is listed as 8 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.