-239 BLACK BUNA 70D O-RING

H70MD239 is an AS568-239 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 3.609 in (91.67 mm), a cross section of 0.139 in (3.53 mm), and an outside diameter of 3.887 in (98.73 mm). In service, this o-ring seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.

Buna-N (Nitrile) offers an economical choice for high-volume maintenance programs, reliable performance in both static and dynamic service. The compound resists propane and butane, greases and lubricants, and hydraulic fluids. Published continuous service range is -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or strong acids are present.

This o-ring is metal detectable for HACCP and foreign-body control programs. You will find this material specified across automotive, hydraulic and pneumatic systems, and agricultural equipment.

H70MD239 ships individually. Nominal inside diameter is listed as 3 5/8 inch. Application requirements vary, so validate compatibility with your process conditions prior to installation. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.