-331 BLACK EPDM 70D NSF O-RING

Part number E70NSF331 is an AS568-331 black EPDM (EPR) 70 Shore A O-Ring built to an inside diameter of 2.225 in (56.52 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 2.645 in (67.18 mm). An o-ring compresses into its gland to block fluid or gas migration across a joint.

Expect good resistance to phosphate ester hydraulic fluids, ketones, and ozone, UV and weathering. That behavior comes from the compound itself: EPDM (EPR) is valued for very good flexibility at low temperature, outstanding weather, ozone and sunlight resistance. Rated temperature range runs from -65°F (-53.9°C) to 300°F (148.9°C) in continuous service. It is not the right choice where mineral oil-based lubricants or aromatic hydrocarbons are present.

This o-ring meets FDA requirements for food contact and carries NSF listing. Maintenance and OEM teams specify it across HVAC and refrigeration, potable water applications, and solar and roofing assemblies.

Reference part number E70NSF331 when ordering; the item is sold individually. Unit weight is approximately 4.97 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.