The U90253 is an AS568-253 clear Polyurethane (AU/EU) 90 Shore A O-Ring built to an inside diameter of 5.359 in (136.12 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.637 in (143.18 mm). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.
It resists impact and shock loading, petroleum oils, and extrusion under high pressure. That behavior comes from the compound itself: Polyurethane (AU/EU) offers toughness that outperforms conventional rubber compounds and exceptional abrasion resistance. Service temperature is rated from -65°F (-53.9°C) through 200°F (93.3°C).
Maintenance and OEM teams specify it across construction machinery, mining and heavy equipment, and off-highway equipment.
U90253 ships individually. Review your operating media and conditions against this specification before installation.
Description 568-253 URETHANE 90 ORINGS -PREM GRADE
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 5.359 inch (136.12 mm)
Actual Outside Diameter 5.637 inch (143.18 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Premium