NPT

EXTERNAL & INTERNAL

RECOMMENDED NO OF PASSES

PITCH TPI
NO OF PASSES
811.5141827
10.320.230.220.180.14
20.250.190.180.150.11
30.210.170.150.130.11
40.170.160.140.130.10
50.160.150.130.120.09
60.160.130.120.110.08
70.150.120.100.090.06
80.150.100.100.08
90.140.100.090.06
100.130.100.08
110.130.090.06
120.120.08
130.120.06
140.10
150.08
160.06
TOTAL2.451.681.371.050.69

NPTF

EXTERNAL & INTERNAL

RECOMMENDED NO OF PASSES

PITCH TPI
NO OF PASSES
811.5141827
10.310.220.210.170.14
20.240.170.170.140.10
30.200.160.140.130.09
40.160.160.140.120.09
50.160.140.140.110.08
60.150.130.120.100.08
70.150.120.100.090.06
80.140.110.100.08
90.140.100.090.06
100.130.100.08
110.130.090.06
120.120.08
130.120.06
140.10
150.08
160.06
TOTAL2.391.641.351.000.64