Brass Parker Air Brake Fitting 1/2" NPT X 1/2" Compression Tube Street Pipe Elbow This one has 1/2" NPT female threads on one end and 1/2" compression tube on the other. Mil Spec Part Original application was the air brake system on the M939 5 ton truck. 4730-00-335-1776,8-8 120203BA, 7373380, 270AB-8-8, 8-8 120203BA, 52966,216309, 41X518, 456B1,470-F-08X08,J246, 216309,913409,971614R91,5029209-044-107. C7D8