568-404 HSN90 DURO ORINGS

Ordered as HSN90404, this is an AS568-404 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring with an inside diameter of 1.85 in (46.99 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 2.4 in (60.96 mm). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

The compound resists modern refrigerants, heat and oxidation, and ozone and weathering. HNBR (Hydrogenated Nitrile) is known for long service life in refrigerant and oilfield duty, strong resistance to rapid gas decompression. Published continuous service range is -40°F (-40°C) to 325°F (162.8°C). It is not the right choice where ketones or esters are present.

Typical settings include engine timing systems, commercial refrigeration, and automotive air conditioning.

HSN90404 ships individually. Nominal inside diameter is listed as 1 7/8 inch. Review your operating media and conditions against this specification before installation.