-243 BLACK EPDM 70D NSF O-RING

The E70NSF243 is an AS568-243 black EPDM (EPR) 70 Shore A O-Ring built to an inside diameter of 4.109 in (104.37 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 4.387 in (111.43 mm). This o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

EPDM (EPR) is widely chosen for strong performance in outdoor and exposed installations, very good flexibility at low temperature. The material holds up against phosphate ester hydraulic fluids, water and steam, and dilute acids and alkalis. Continuous operating temperature is published at -65°F (-53.9°C) to 300°F (148.9°C). Verify compatibility before use with mineral oil-based lubricants or aromatic hydrocarbons.

The compound meets FDA requirements for food contact and carries NSF listing. Maintenance and OEM teams specify it across water and steam systems, potable water applications, and HVAC and refrigeration.

Order part number E70NSF243, sold individually. Unit weight is approximately 3.7872 g. Review your operating media and conditions against this specification before installation.