MaxLINE 45 Degree 1/2" Brass Elbow Brand new 45° brass elbow. This is a solid brass street elbow that features 1/2" male NPT threads on one side as well as 1/2" female NPT on the opposite side. This part is produced by RapidAir for the 3/4" MaxLine air piping systems outlets part #M7510 to install an air coupler at a 45 degree angle, but can be used for other applications as well. Specifications: 1/2" Male NPT Threads 1/2" Female NPT Threads Solid Brass Part Number: 50131 (1/2" Threads Measure About 3/4" in Diameter)