This o-ring is supplied in AS568-149 black Buna-N (Nitrile) 70 Shore A measuring 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), catalogued under part number H70149. It seats in a machined groove and forms a leak-tight barrier when compressed between two mating surfaces.
As a material, Buna-N (Nitrile) delivers reliable performance in both static and dynamic service, strong abrasion and tear resistance. Expect good resistance to hydraulic fluids, greases and lubricants, and petroleum-based oils. The material carries a published service range of -40°F (-40°C) to 250°F (121.1°C). It should not be specified for service in polar solvents or strong acids.
You will find this material specified across fluid power, general industrial maintenance, and hydraulic and pneumatic systems.
Order part number H70149, sold individually. Unit weight is approximately 0.0016 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.
Description -149 BLACK BUNA 70D O-RING
Actual Cross Section 0.103 inch (2.62 mm)
Actual Inside Diameter 2.8 inch (71.12 mm)
Actual Outside Diameter 3.006 inch (76.35 mm)
Measurement System Imperial
Product Category O-Rings - Bulk - Commodity