-338 BLACK BUNA 70D O-RING

H70MD338 is an AS568-338 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 3.1 in (78.74 mm), a cross section of 0.21 in (5.33 mm), and an outside diameter of 3.52 in (89.41 mm). In service, this o-ring delivers dependable bidirectional sealing in a compact groove envelope.

Buna-N (Nitrile) is known for low compression set under sustained load and the most widely specified general-purpose sealing elastomer. The compound resists propane and butane, greases and lubricants, and hydraulic fluids. Service temperature is rated from -40°F (-40°C) through 250°F (121.1°C).

The compound is metal detectable for HACCP and foreign-body control programs. Maintenance and OEM teams specify it across automotive, agricultural equipment, and general industrial maintenance.

H70MD338 ships individually. As always, verify media compatibility and operating conditions against the requirements of your specific application.