*568-156 URETHANE 90 ORINGS -PR GRADE

The U90156 is an AS568-156 clear Polyurethane (AU/EU) 90 Shore A O-Ring supplied with an inside diameter of 4.237 in (107.62 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 4.443 in (112.85 mm). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

It resists impact and shock loading, extrusion under high pressure, and abrasion and wear. Polyurethane (AU/EU) is specified for toughness that outperforms conventional rubber compounds and long wear life in dynamic reciprocating service. Continuous operating temperature is published at -65°F (-53.9°C) to 200°F (93.3°C). Verify compatibility before use with acids and bases or prolonged humidity at elevated temperature.

Common environments for this compound include construction machinery, press and forming equipment, and mining and heavy equipment.

This item is sold individually under part number U90156. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.