The U90251 is an AS568-251 clear Polyurethane (AU/EU) 90 Shore A O-Ring supplied with an inside diameter of 5.109 in (129.77 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 5.387 in (136.83 mm). This o-ring delivers dependable bidirectional sealing in a compact groove envelope.
As a material, Polyurethane (AU/EU) is widely chosen for exceptional abrasion resistance, very high tensile strength and load capacity. Expect good resistance to extrusion under high pressure, abrasion and wear, and ozone. Published continuous service range is -65°F (-53.9°C) to 200°F (93.3°C). Verify compatibility before use with acids and bases or hot water and steam.
It sees regular use in press and forming equipment, mining and heavy equipment, and off-highway equipment.
Order part number U90251, sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application. For a size or compound outside the standard catalog, APG can quote from a print or sample.
Description 568-251 URETHANE 90 ORINGS -PREM GRADE
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 5.109 inch (129.77 mm)
Actual Outside Diameter 5.387 inch (136.83 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Premium