Ordered as U70253, this is an AS568-253 clear Polyurethane (AU/EU) 70 Shore A O-Ring with 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). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.
Polyurethane (AU/EU) is known for long wear life in dynamic reciprocating service and exceptional abrasion resistance. It resists ozone, abrasion and wear, and impact and shock loading. The material carries a published service range of -65°F (-53.9°C) to 200°F (93.3°C). Verify compatibility before use with ketones or hot water and steam.
Maintenance and OEM teams specify it across off-highway equipment, construction machinery, and mining and heavy equipment.
U70253 ships individually. Nominal inside diameter is listed as 5 3/8 inch. Check the compound against your process media, pressure and temperature before committing to a design.
Description 568-253 URETHANE 70 DURO ORINGS
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