568-440 HSN90 DURO ORINGS

Part number HSN90440 is an AS568-440 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring built to an inside diameter of 6.725 in (170.82 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 7.275 in (184.79 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

HNBR (Hydrogenated Nitrile) is specified here for improved ozone and weathering resistance over standard nitrile, oil resistance of nitrile with substantially better heat capability. Expect good resistance to petroleum oils and fuels, sour gas and amine inhibitors, and ozone and weathering. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C).

You will find this material specified across engine timing systems, heavy-duty powertrain, and oilfield and downhole equipment.

Reference part number HSN90440 when ordering; the item is sold individually. Nominal inside diameter is listed as 6 3/4 inch. Review your operating media and conditions against this specification before installation.