568-123 HSN90 DURO ORINGS

APG stocks the HSN90123, an AS568-123 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring supplied with an inside diameter of 1.174 in (29.82 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 1.38 in (35.05 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

This material stands up to ozone and weathering, modern refrigerants, and sour gas and amine inhibitors. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is known for long service life in refrigerant and oilfield duty, strong resistance to rapid gas decompression. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C). Exposure to ketones or esters will shorten service life.

Common environments for this compound include oilfield and downhole equipment, commercial refrigeration, and heavy-duty powertrain.

This item is sold individually under part number HSN90123. Nominal inside diameter is listed as 1 3/16 inch. 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.