568-139 URETHANE 90 ORINGS -PREM GRADE

Part number U90139 is an AS568-139 clear Polyurethane (AU/EU) 90 Shore A O-Ring with an inside diameter of 2.175 in (55.25 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.381 in (60.48 mm). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Polyurethane (AU/EU) delivers toughness that outperforms conventional rubber compounds and long wear life in dynamic reciprocating service. The compound resists impact and shock loading, extrusion under high pressure, and ozone. Continuous operating temperature is published at -65°F (-53.9°C) to 200°F (93.3°C). It should not be specified for service in ketones or hot water and steam.

Common environments for this compound include off-highway equipment, mining and heavy equipment, and hydraulic cylinders.

U90139 ships individually. Nominal inside diameter is listed as 2 3/16 inch. Review your operating media and conditions against this specification before installation.