-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, carries NSF listing, and is metal detectable for HACCP and foreign-body control programs. 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.