568-419 HSN90 DURO ORINGS

APG stocks the HSN90419, an AS568-419 green HNBR (Hydrogenated Nitrile) 90 Shore A O-Ring with an inside diameter of 3.725 in (94.62 mm), a cross section of 0.275 in (6.99 mm), and an outside diameter of 4.275 in (108.59 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

The material holds up against heat and oxidation, ozone and weathering, and sour gas and amine inhibitors. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is widely chosen for long service life in refrigerant and oilfield duty, strong resistance to rapid gas decompression. Rated temperature range runs from -40°F (-40°C) to 325°F (162.8°C) in continuous service. It is not the right choice where esters or chlorinated hydrocarbons are present.

Typical settings include automotive air conditioning, heavy-duty powertrain, and commercial refrigeration.

Order part number HSN90419, sold individually. Nominal inside diameter is listed as 3 3/4 inch. Review your operating media and conditions against this specification before installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.