The E3X39 is a black EPDM (EPR) 70 Shore A O-Ring with an inside diameter of 39 mm (1.535 in), a cross section of 3 mm (0.118 in), and an outside diameter of 45 mm (1.77 in). This o-ring compresses into its gland to block fluid or gas migration across a joint.
The compound resists brake fluid, ketones, and water and steam. EPDM (EPR) offers outstanding weather, ozone and sunlight resistance, good electrical insulating characteristics. Service temperature is rated from -65°F (-53.9°C) through 300°F (148.9°C). It should not be specified for service in mineral oil-based lubricants or petroleum oils and fuels.
Maintenance and OEM teams specify it across brake and phosphate ester systems, water and steam systems, and potable water applications.
Stocked as E3X39 and sold individually. Check the compound against your process media, pressure and temperature before committing to a design. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Description 3MM CS X 39MM ID BLACK EPDM 70D
Actual Outside Diameter 45 mm (1.77 inch)
Actual Cross Section 3 mm (0.118 inch)
Actual Inside Diameter 39 mm (1.535 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity