-161 BLACK BUNA 70D O-RING

Ordered as H70MD161, this is an AS568-161 black Buna-N (Nitrile) 70 Shore A O-Ring measuring an inside diameter of 5.487 in (139.37 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 5.693 in (144.6 mm). The o-ring compresses into its gland to block fluid or gas migration across a joint.

Buna-N (Nitrile) is specified here for reliable performance in both static and dynamic service, low compression set under sustained load. The material holds up against hydraulic fluids, many alcohols, and water. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It is not the right choice where automotive brake fluid or polar solvents are present.

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

Reference part number H70MD161 when ordering; the item is sold individually. Nominal inside diameter is listed as 5 1/2 inch. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.