568-155 URETHANE 90 ORINGS -PREM GRADE

APG stocks the U90155, an AS568-155 clear Polyurethane (AU/EU) 90 Shore A O-Ring with an inside diameter of 3.987 in (101.27 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 4.193 in (106.5 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

The compound resists ozone, petroleum oils, and extrusion under high pressure. Polyurethane (AU/EU) is valued for exceptional abrasion resistance and toughness that outperforms conventional rubber compounds. Published continuous service range is -65°F (-53.9°C) to 200°F (93.3°C). It should not be specified for service in hot water and steam or ketones.

It sees regular use in mining and heavy equipment, high-pressure fluid power, and press and forming equipment.

Stocked as U90155 and sold individually. Nominal inside diameter is listed as 4 inch. Review your operating media and conditions against this specification before installation.