The E70NSF137 is an AS568-137 black EPDM (EPR) 70 Shore A O-Ring supplied with an inside diameter of 2.05 in (52.07 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 2.256 in (57.3 mm). This o-ring creates a positive seal at flange, piston and rod interfaces without added hardware.
EPDM (EPR) is specified here for outstanding weather, ozone and sunlight resistance, good electrical insulating characteristics. Expect good resistance to brake fluid, ketones, and phosphate ester hydraulic fluids. Rated temperature range runs from -65°F (-53.9°C) to 300°F (148.9°C) in continuous service.
The compound meets FDA requirements for food contact and carries NSF listing. You will find this material specified across solar and roofing assemblies, HVAC and refrigeration, and outdoor equipment.
Reference part number E70NSF137 when ordering; the item is sold individually. Unit weight is approximately 1.211 g and nominal inside diameter is listed as 2 1/16 inch. Review your operating media and conditions against this specification before installation.
Description -137 BLACK EPDM 70D NSF O-RING
Actual Cross Section 0.103 inch (2.62 mm)
Actual Inside Diameter 2.05 inch (52.07 mm)
Actual Outside Diameter 2.256 inch (57.3 mm)
Measurement System Imperial
Product Category O-Rings - FDA / Metal Detectable