568-273 HSN90 DURO ORINGS

Part number HSN90273 is an AS568-273 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring with an inside diameter of 9.734 in (247.24 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 10.012 in (254.3 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

The compound resists ozone and weathering, petroleum oils and fuels, and heat and oxidation. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is valued for excellent abrasion and tear strength, the oil resistance of nitrile with substantially better heat capability. 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 chlorinated hydrocarbons.

Maintenance and OEM teams specify it across commercial refrigeration, automotive air conditioning, and engine timing systems.

Order part number HSN90273, sold individually. Nominal inside diameter is listed as 9 3/4 inch. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.