568-139 URETHANE 70 DURO ORINGS

This o-ring is supplied in AS568-139 clear Polyurethane (AU/EU) 70 Shore A measuring 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), catalogued under part number U70139. It provides a reliable static or dynamic seal by deforming into its gland under assembly load.

Polyurethane (AU/EU) is widely chosen for outstanding extrusion resistance at elevated pressure and exceptional abrasion resistance. The compound resists ozone, extrusion under high pressure, and impact and shock loading. The material carries a published service range of -65°F (-53.9°C) to 200°F (93.3°C). It should not be specified for service in ketones or prolonged humidity at elevated temperature.

Maintenance and OEM teams specify it across mining and heavy equipment, hydraulic cylinders, and off-highway equipment.

Reference part number U70139 when ordering; the item is sold individually. Nominal inside diameter is listed as 2 3/16 inch. Review your operating media and conditions against this specification before installation.