3MM CS X 78MM ID BLACK EPDM 70D

Part number E3X78 is a black EPDM (EPR) 70 Shore A O-Ring built to an inside diameter of 78 mm (3.071 in), a cross section of 3 mm (0.118 in), and an outside diameter of 84 mm (3.31 in). An o-ring delivers dependable bidirectional sealing in a compact groove envelope.

This material stands up to phosphate ester hydraulic fluids, water and steam, and ketones. That behavior comes from the compound itself: EPDM (EPR) is widely chosen for outstanding weather, ozone and sunlight resistance, excellent hot water and steam resistance. The material carries a published service range of -65°F (-53.9°C) to 300°F (148.9°C). Verify compatibility before use with aromatic hydrocarbons or mineral oil-based lubricants.

It sees regular use in outdoor equipment, solar and roofing assemblies, and potable water applications.

Reference part number E3X78 when ordering; the item is sold individually. Unit weight is approximately 2.267 g. Review your operating media and conditions against this specification before installation. If you need a size, durometer or compound that is not listed, APG can cross-reference from a print, a sample or a competitor part number.