4MM CS X 30MM ID BLACK EPDM 70D

Ordered as E4X30, this is a black EPDM (EPR) 70 Shore A O-Ring measuring an inside diameter of 30 mm (1.181 in), a cross section of 4 mm (0.157 in), and an outside diameter of 38 mm (1.5 in). The o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.

It resists brake fluid, ketones, and ozone, UV and weathering. That behavior comes from the compound itself: EPDM (EPR) is specified for good electrical insulating characteristics and very good flexibility at low temperature. Service temperature is rated from -65°F (-53.9°C) through 300°F (148.9°C). Verify compatibility before use with petroleum oils and fuels or aromatic hydrocarbons.

It sees regular use in brake and phosphate ester systems, HVAC and refrigeration, and potable water applications.

Reference part number E4X30 when ordering; the item is sold individually. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG supports cross-referencing from drawings, samples and competitor numbers when a listed size is not an exact fit.