HSN (HNBR) 80 568-045

Part number HSN80045 is an AS568-045 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring supplied with an inside diameter of 3.989 in (101.32 mm), a cross section of 0.07 in (1.78 mm), and an outside diameter of 4.129 in (104.88 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

As a material, HNBR (Hydrogenated Nitrile) is known for strong resistance to rapid gas decompression, improved ozone and weathering resistance over standard nitrile. The compound resists modern refrigerants, ozone and weathering, and sour gas and amine inhibitors. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). It should not be specified for service in ketones or esters.

You will find this material specified across engine timing systems, automotive air conditioning, and heavy-duty powertrain.

HSN80045 ships individually. Nominal inside diameter is listed as 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.