APG stocks the U90243, an AS568-243 clear Polyurethane (AU/EU) 90 Shore A O-Ring built to an inside diameter of 4.109 in (104.37 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.387 in (111.43 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.
Polyurethane (AU/EU) is widely chosen for long wear life in dynamic reciprocating service, very high tensile strength and load capacity. It resists abrasion and wear, impact and shock loading, and petroleum oils. Published continuous service range is -65°F (-53.9°C) to 200°F (93.3°C).
Maintenance and OEM teams specify it across mining and heavy equipment, high-pressure fluid power, and press and forming equipment.
Order part number U90243, sold individually. Nominal inside diameter is listed as 4 1/8 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Description 568-243 URETHANE 90 ORINGS -PREM GRADE
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 4.109 inch (104.37 mm)
Actual Outside Diameter 4.387 inch (111.43 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Premium