568-346 GREEN HNBR (HSN) 70 ORINGS

Part number HS70346 is an AS568-346 green HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring supplied with an inside diameter of 4.1 in (104.14 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.52 in (114.81 mm). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.

The material holds up against heat and oxidation, petroleum oils and fuels, and modern refrigerants. That behavior comes from the compound itself: HNBR (Hydrogenated Nitrile) is valued for improved ozone and weathering resistance over standard nitrile, strong resistance to rapid gas decompression. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C). Verify compatibility before use with ketones or chlorinated hydrocarbons.

You will find this material specified across heavy-duty powertrain, oilfield and downhole equipment, and commercial refrigeration.

Stocked as HS70346 and sold individually. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.