2 NPT Thread Dimensions

Standard: ANSI B 1.20.1
Pitch of thread: 2.21
Thread Angle: 60°
Taper Angle: 1°47′
Nominal Pipe Size: 1″
Outside Dia(D): 33.401 mm
Pitch diameter at plane of hand-tight engagement (E): 31.461 mm
position of handtight engagement(L1): 10.160mm/ 4.60Gg
usefull external thread(L2): 17.343mm
external thread with complete thread profile(L4): 12.924mm
Tapping Drill Size: 28.50 mm