Ordered as E2.5X51, this is a black EPDM (EPR) 70 Shore A O-Ring supplied with an inside diameter of 51 mm (2.008 in), a cross section of 2.5 mm (0.098 in), and an outside diameter of 56 mm (2.2 in). The o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.
As a material, EPDM (EPR) is widely chosen for very good flexibility at low temperature, excellent hot water and steam resistance. This material stands up to brake fluid, dilute acids and alkalis, and ozone, UV and weathering. Published continuous service range is -65°F (-53.9°C) to 300°F (148.9°C). Exposure to aromatic hydrocarbons or mineral oil-based lubricants will shorten service life.
It sees regular use in brake and phosphate ester systems, outdoor equipment, and solar and roofing assemblies.
Reference part number E2.5X51 when ordering; the item is sold individually. Unit weight is approximately 1.093 g. As always, verify media compatibility and operating conditions against the requirements of your specific application. APG can cross-reference from an existing part number, a drawing or a physical sample if this size is not an exact match.
Description 2.5MM CS X 51MM ID BLACK EPDM 70D
Actual Outside Diameter 56 mm (2.2 inch)
Actual Cross Section 2.5 mm (0.098 inch)
Actual Inside Diameter 51 mm (2.008 inch)
Measurement System Metric
Product Category O-Rings - Metric - Commodity