568-368 HSN90 DURO ORINGS

APG stocks the HSN90368, an AS568-368 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring measuring an inside diameter of 7.725 in (196.22 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 8.145 in (206.88 mm). An o-ring remains the most cost-effective sealing element available for pressurized assemblies.

HNBR (Hydrogenated Nitrile) is specified here for oil resistance of nitrile with substantially better heat capability, improved ozone and weathering resistance over standard nitrile. Expect good resistance to sour gas and amine inhibitors, heat and oxidation, and ozone and weathering. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). Exposure to ketones or strong oxidizing acids will shorten service life.

Typical settings include automotive air conditioning, commercial refrigeration, and heavy-duty powertrain.

Order part number HSN90368, sold individually. Nominal inside diameter is listed as 7 3/4 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.