HSN (HNBR) 80 568-340

Ordered as HSN80340, this is an AS568-340 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring with an inside diameter of 3.35 in (85.09 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.77 in (95.76 mm). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Expect good resistance to petroleum oils and fuels, sour gas and amine inhibitors, and heat and oxidation. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) offers long service life in refrigerant and oilfield duty, excellent abrasion and tear strength. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C). Verify compatibility before use with ketones or chlorinated hydrocarbons.

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

Reference part number HSN80340 when ordering; the item is sold individually. Unit weight is approximately 8.128 g and nominal inside diameter is listed as 3 3/8 inch. Review your operating media and conditions against this specification before installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.