568-388 URETHANE 90 ORINGS -PREM GRADE

U90388 is an AS568-388 clear Polyurethane (AU/EU) 90 Shore A O-Ring supplied with an inside diameter of 18.953 in (481.41 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 19.373 in (492.07 mm). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

As a material, Polyurethane (AU/EU) is valued for very high tensile strength and load capacity, long wear life in dynamic reciprocating service. It resists abrasion and wear, extrusion under high pressure, and petroleum oils. Continuous operating temperature is published at -65°F (-53.9°C) to 200°F (93.3°C). It is not the right choice where prolonged humidity at elevated temperature or acids and bases are present.

Maintenance and OEM teams specify it across press and forming equipment, construction machinery, and high-pressure fluid power.

This item is sold individually under part number U90388. Review your operating media and conditions against this specification before installation.