-149 BLACK BUNA 70D O-RING

The H70MD149 is an AS568-149 black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 2.8 in (71.12 mm), a cross section of 0.103 in (2.62 mm), and an outside diameter of 3.006 in (76.35 mm). This o-ring remains the most cost-effective sealing element available for pressurized assemblies.

The compound resists greases and lubricants, propane and butane, and hydraulic fluids. That behavior comes from the compound itself: Buna-N (Nitrile) offers low compression set under sustained load, reliable performance in both static and dynamic service. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. Exposure to polar solvents or ozone and direct sunlight will shorten service life.

This item is metal detectable for HACCP and foreign-body control programs. It sees regular use in agricultural equipment, hydraulic and pneumatic systems, and automotive.

Stocked as H70MD149 and sold individually. Nominal inside diameter is listed as 2 13/16 inch. As always, verify media compatibility and operating conditions against the requirements of your specific application. Not finding the exact configuration you need? APG cross-references from prints, samples and competitor part numbers.