The E80PC256 is an AS568-256 black EPDM (EPR) 80 Shore A O-Ring measuring an inside diameter of 5.734 in (145.64 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 6.012 in (152.7 mm). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
This material stands up to ketones, ozone, UV and weathering, and brake fluid. That behavior comes from the compound itself: EPDM (EPR) delivers excellent hot water and steam resistance, strong performance in outdoor and exposed installations. 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.
Common environments for this compound include brake and phosphate ester systems, outdoor equipment, and potable water applications.
Reference part number E80PC256 when ordering; the item is sold individually. Check the compound against your process media, pressure and temperature before committing to a design. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.
Description -256 BLACK EPDM 80D O-RING
Actual Cross Section 0.139 inch (3.53 mm)
Actual Inside Diameter 5.734 inch (145.64 mm)
Actual Outside Diameter 6.012 inch (152.7 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity