U70389 is an AS568-389 clear Polyurethane (AU/EU) 70 Shore A O-Ring built to an inside diameter of 19.953 in (506.81 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 20.373 in (517.47 mm). In service, this o-ring remains the most cost-effective sealing element available for pressurized assemblies.
Expect good resistance to ozone, extrusion under high pressure, and petroleum oils. Polyurethane (AU/EU) is specified for exceptional abrasion resistance, very high tensile strength and load capacity. Service temperature is rated from -65°F (-53.9°C) through 200°F (93.3°C).
It sees regular use in high-pressure fluid power, hydraulic cylinders, and off-highway equipment.
Order part number U70389, sold individually. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Description 568-389 URETHANE 70 DURO ORINGS
Actual Cross Section 0.21 inch (5.33 mm)
Actual Inside Diameter 19.953 inch (506.81 mm)
Actual Outside Diameter 20.373 inch (517.47 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Premium