1-1/4 NPT Thread

Standard: ANSI B 1.20.1
Pitch of thread: 2.209
Thread Angle: 60°
Taper Angle: 1°47′
Nominal Pipe Size: 1-1/2″
Outside Dia(D): 42.164 mm
Pitch diameter at plane of hand-tight engagement (E): 40.218 mm
position of handtight engagement(L1):10.668mm/ 4.83Gg
usefull external thread(L2): 17.953mm
external thread with complete thread profile(L4): 13.536mm
Tapping Drill Size: 37.00 mm