HSN (HNBR) 80 568-256

Ordered as HSN80256, this is an AS568-256 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring supplied with an inside diameter of 5.734 in (145.64 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.012 in (152.7 mm). The o-ring delivers dependable bidirectional sealing in a compact groove envelope.

This material stands up to heat and oxidation, sour gas and amine inhibitors, and ozone and weathering. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is known for excellent abrasion and tear strength, long service life in refrigerant and oilfield duty. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). It is not the right choice where ketones or esters are present.

You will find this material specified across engine timing systems, automotive air conditioning, and heavy-duty powertrain.

HSN80256 ships individually. Unit weight is approximately 6.2496 g and nominal inside diameter is listed as 5 3/4 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.