568-455 HSN90 DURO ORINGS

APG stocks the HSN90455, an AS568-455 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring measuring an inside diameter of 12.975 in (329.57 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 13.525 in (343.54 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

Expect good resistance to modern refrigerants, petroleum oils and fuels, and heat and oxidation. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is specified for improved ozone and weathering resistance over standard nitrile, strong resistance to rapid gas decompression. Continuous operating temperature is published at -40°F (-40°C) to 325°F (162.8°C).

Maintenance and OEM teams specify it across engine timing systems, commercial refrigeration, and heavy-duty powertrain.

This item is sold individually under part number HSN90455. Nominal inside diameter is listed as 13 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. For a size or compound outside the standard catalog, APG can quote from a print or sample.