568-239 BLACK HNBR HSN70 O-Ring

APG stocks the HSN70239, an AS568-239 black HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring measuring an inside diameter of 3.609 in (91.67 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.887 in (98.73 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

HNBR (Hydrogenated Nitrile) is specified here for strong resistance to rapid gas decompression, improved ozone and weathering resistance over standard nitrile. The material holds up against 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). Verify compatibility before use with esters or strong oxidizing acids.

It sees regular use in commercial refrigeration, oilfield and downhole equipment, and engine timing systems.

Order part number HSN70239, sold individually. Unit weight is approximately 3.398 g. Application requirements vary, so validate compatibility with your process conditions prior to installation.