568-418 HSN90 DURO ORINGS

Part number HSN90418 is an AS568-418 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring built to an inside diameter of 3.6 in (91.44 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 4.15 in (105.41 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

HNBR (Hydrogenated Nitrile) delivers the oil resistance of nitrile with substantially better heat capability, improved ozone and weathering resistance over standard nitrile. The compound resists ozone and weathering, petroleum oils and fuels, and sour gas and amine inhibitors. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). Verify compatibility before use with esters or ketones.

Maintenance and OEM teams specify it across engine timing systems, heavy-duty powertrain, and oilfield and downhole equipment.

This item is sold individually under part number HSN90418. Nominal inside diameter is listed as 3 5/8 inch. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.