-253 BLACK EPDM 70D O-RING

Part number E70253 is an AS568-253 black EPDM (EPR) 70 Shore A O-Ring measuring 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). An o-ring compresses into its gland to block fluid or gas migration across a joint.

The material holds up against ozone, UV and weathering, ketones, and dilute acids and alkalis. That behavior comes from the compound itself: EPDM (EPR) offers excellent hot water and steam resistance, very good flexibility at low temperature. The material carries a published service range of -65°F (-53.9°C) to 300°F (148.9°C). It should not be specified for service in aromatic hydrocarbons or petroleum oils and fuels.

You will find this material specified across HVAC and refrigeration, brake and phosphate ester systems, and outdoor equipment.

Reference part number E70253 when ordering; the item is sold individually. Unit weight is approximately 5.0306 g and nominal inside diameter is listed as 5 3/8 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application.