*HSN (HNBR) 80 568-349

APG stocks the HSN80349, an AS568-349 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring built to an inside diameter of 4.475 in (113.67 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 4.895 in (124.33 mm). An o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

HNBR (Hydrogenated Nitrile) is specified here for improved ozone and weathering resistance over standard nitrile, excellent abrasion and tear strength. It resists heat and oxidation, petroleum oils and fuels, and modern refrigerants. The material carries a published service range of -40°F (-40°C) to 325°F (162.8°C).

Maintenance and OEM teams specify it across commercial refrigeration, engine timing systems, and oilfield and downhole equipment.

Stocked as HSN80349 and sold individually. Unit weight is approximately 11.181 g and nominal inside diameter is listed as 4 1/2 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation.