HSN (HNBR) 80 568-228

Ordered as HSN80228, this is an AS568-228 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring built to an inside diameter of 2.234 in (56.74 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 2.512 in (63.8 mm). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

This material stands up to modern refrigerants, petroleum oils and fuels, and ozone and weathering. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is valued for long service life in refrigerant and oilfield duty, strong resistance to rapid gas decompression. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C). It is not the right choice where strong oxidizing acids or chlorinated hydrocarbons are present.

Common environments for this compound include automotive air conditioning, engine timing systems, and heavy-duty powertrain.

Stocked as HSN80228 and sold individually. Unit weight is approximately 2.37 g and nominal inside diameter is listed as 2 1/4 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.