568-155 BLACK HNBR HSN70 O-Ring

Part number HSN70155 is an AS568-155 black HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 3.987 in (101.27 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 4.193 in (106.5 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

As a material, HNBR (Hydrogenated Nitrile) is specified for improved ozone and weathering resistance over standard nitrile, the oil resistance of nitrile with substantially better heat capability. Expect good resistance to ozone and weathering, heat and oxidation, and petroleum oils and fuels. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). Applications involving strong oxidizing acids or ketones call for a different compound.

Typical settings include engine timing systems, automotive air conditioning, and oilfield and downhole equipment.

Order part number HSN70155, sold individually. Unit weight is approximately 2.0992 g and nominal inside diameter is listed as 4 inch. Application requirements vary, so validate compatibility with your process conditions prior to 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.