568-343 HSN90 DURO ORINGS

The HSN90343 is an AS568-343 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring with an inside diameter of 3.725 in (94.62 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.145 in (105.28 mm). This o-ring delivers dependable bidirectional sealing in a compact groove envelope.

HNBR (Hydrogenated Nitrile) is known for long service life in refrigerant and oilfield duty, excellent abrasion and tear strength. The compound resists sour gas and amine inhibitors, heat and oxidation, and modern refrigerants. Continuous operating temperature is published at -40°F (-40°C) to 325°F (162.8°C). Applications involving ketones or strong oxidizing acids call for a different compound.

It sees regular use in automotive air conditioning, commercial refrigeration, and engine timing systems.

Reference part number HSN90343 when ordering; the item is sold individually. Unit weight is approximately 9.1586 g and nominal inside diameter is listed as 3 3/4 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.