3/8 NPT Thread

Standard: ANSI B 1.20.1
Pitch of thread: 1.41
Thread Angle: 60°
Taper Angle: 1°47′
Nominal Pipe Size: 3/8″
Outside Dia(D): 17.145 mm
Pitch diameter at plane of hand-tight engagement (E): 15.926 mm
position of handtight engagement(L1): 6.096mm/ 4.32Gg
usefull external thread(L2): 10.358mm
external thread with complete thread profile(L4): 7.536mm
Tapping Drill Size: 14.10 mm