-389 BLACK EPDM 70D O-RING

Part number E70389 is an AS568-389 black EPDM (EPR) 70 Shore A O-Ring supplied with 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). An o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

The material holds up against ozone, UV and weathering, dilute acids and alkalis, and brake fluid. That behavior comes from the compound itself: EPDM (EPR) is valued for excellent hot water and steam resistance, very good flexibility at low temperature. Continuous operating temperature is published at -65°F (-53.9°C) to 300°F (148.9°C).

It sees regular use in HVAC and refrigeration, water and steam systems, and outdoor equipment.

Order part number E70389, sold individually. Unit weight is approximately 0.0396 g and nominal inside diameter is listed as 20 inch. Review your operating media and conditions against this specification before installation.