HSN (HNBR) 80 568-236

Ordered as HSN80236, this is an AS568-236 green HNBR (Hydrogenated Nitrile) 80 Shore A O-Ring built to an inside diameter of 3.234 in (82.14 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.512 in (89.2 mm). The o-ring compresses into its gland to block fluid or gas migration across a joint.

HNBR (Hydrogenated Nitrile) is specified here for long service life in refrigerant and oilfield duty, strong resistance to rapid gas decompression. The compound resists modern refrigerants, petroleum oils and fuels, and heat and oxidation. Service temperature is rated from -40°F (-40°C) through 325°F (162.8°C). Applications involving esters or ketones call for a different compound.

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

Order part number HSN80236, sold individually. Unit weight is approximately 3.38 g and nominal inside diameter is listed as 3 1/4 inch. 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.