... Pneumatic Coupling); Body: 1/4" (3/8"); Thread: NPT (National Pipe Thread); Shape: Female, male, hose barb, plug, nipple, push on ... 120 degree Centi; Application: Pneumatic tools, general air connections, air piping systems, air pressure equipments; The quick couplers include: Female thread ... working pressure, air leakage, surface finishing and thread test. Air Fitting(Air Coupler, Pneumatic Coupling)