568-355 GREEN HNBR (HSN) 70 ORINGS

HS70355 is an AS568-355 green HNBR (Hydrogenated Nitrile) 70 Shore A O-Ring with an inside diameter of 5.225 in (132.72 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 5.645 in (143.38 mm). In service, this o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

As a material, HNBR (Hydrogenated Nitrile) offers the oil resistance of nitrile with substantially better heat capability, improved ozone and weathering resistance over standard nitrile. It resists ozone and weathering, petroleum oils and fuels, and modern refrigerants. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C).

Maintenance and OEM teams specify it across automotive air conditioning, oilfield and downhole equipment, and heavy-duty powertrain.

HS70355 ships individually. Application requirements vary, so validate compatibility with your process conditions prior to installation. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.