Metric Thread Gages Standard Pitch Diameter Chart
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114
GAGE ASSEMBLY COMPANY
Metric Thread Gages
Standard Pitch Diameter Chart
FOR EXTERNAL THREAD
FOR INTERNAL THREAD
PITCH DIAMETER
PITCH DIAMETER
PITCH DIAMETER
PITCH DIAMETER
NOMINAL
GO RING GAGE
NOT GO RING GAGE
GO PLUG GAGE
NOT GO PLUG GAGE
SIZE & PITCH
6g TOLERANCE
6g TOLERANCE
6H TOLERANCE
6H TOLERANCE
MM
IN. (REF)
MM
IN. (REF)
MM
IN. (REF)
MM
IN. (REF)
M 1.6 X 0.35
1.354
.05331
1.291
.05083
1.373
.05406
1.458
.05740
M
2 X 0.4
1.721
.06776
1.654
.06512
1.740
.06850
1.830
.07205
M 2.5 X 0.45
2.188
.08614
2.117
.08335
2.208
.08693
2.303
.09067
M
3 X 0.5
2.655
.10453
2.580
.10157
2.675
.10531
2.775
.10925
M 3.5 X 0.6
3.089
.12161
3.004
.11827
3.110
.12244
3.222
.12685
M
4 X 0.7
3.523
.13870
3.433
.13516
3.545
.13957
3.663
.14421
M
5 X 0.8
4.456
.17543
4.361
.17169
4.480
.17638
4.605
.18130
M
6 X 1.0
5.324
.20961
5.212
.20520
5.350
.21063
5.500
.21654
M
8 X 1.25
7.160
.28189
7.042
.27724
7.188
.28299
7.348
.28929
M
8 X 1.0
7.324
.28835
7.212
.28394
7.350
.28937
7.500
.29528
M 10 X 1.5
8.994
.35409
8.862
.34890
9.026
.35535
9.206
.36244
M 10 X 1.25
9.160
.36063
9.042
.35598
9.188
.36173
9.348
.36803
M 10 X 1.0
9.324
.36709
9.212
.36268
9.350
.36811
9.500
.37402
M 10 X 0.75
9.491
.37366
9.391
.36972
9.513
.37453
9.645
.37972
M 12 X 1.75
10.829
.42634
10.679
.42043
10.863
.42768
11.063
.43555
M 12 X 1.5
10.994
.43283
10.854
.42732
11.026
.43409
11.216
.44157
M 12 X 1.25
11.160
.43937
11.028
.43417
11.188
.44047
11.368
.44756
M 12 X 1.0
11.324
.44583
11.206
.44118
11.350
.44685
11.510
.45315
M 14 X 2.0
12.663
.49854
12.503
.49224
12.701
.50004
12.913
.50839
M 14 X 1.5
12.994
.51157
12.854
.50606
13.026
.51283
13.216
.52031
M 15 X 1.0
14.324
.56394
14.206
.55929
14.350
.56496
14.510
.57126
M 16 X 2.0
14.663
.57728
14.503
.57098
14.701
.57878
14.913
.58713
M 16 X 1.5
14.994
.59031
14.854
.58480
15.026
.59157
15.216
.59906
M 17 X 1.0
16.324
.64268
16.206
.63803
16.350
.64370
16.510
.65000
M 18 X 1.5
16.994
.66906
16.854
.66354
17.026
.67031
17.216
.67780
M 20 X 2.5
18.334
.72181
18.164
.71512
18.376
.72346
18.600
.73228
M 20 X 1.5
18.994
.74780
18.854
.74228
19.026
.74906
19.216
.75654
M 20 X 1.0
19.324
.76079
19.206
.75614
19.350
.76181
19.510
.76811
M 22 X 2.5
20.334
.80055
20.164
.79386
20.376
.80220
20.600
.81102
M 22 X 1.5
20.994
.82654
20.854
.82102
21.026
.82780
21.216
.83528
M 24 X 3.0
22.003
.86626
21.803
.85839
22.051
.86815
22.316
.87858
M 24 X 2.0
22.663
.89224
22.493
.88555
22.701
.89374
22.925
.90256
M 25 X 1.5
23.994
.94465
23.844
.93874
24.026
.94591
24.226
.95378
M 27 X 3.0
25.003
.98437
24.803
.97650
25.051
.98626
25.316
.99669
M 27 X 2.0
25.663
1.01035
25.493
1.00366
25.701
1.01185
25.925
1.02067
M 30 X 3.5
27.674
1.08953
27.642
1.08118
27.727
1.09161
28.007
1.10264
M 30 X 2.0
28.663
1.12846
28.493
1.12177
28.701
1.12996
28.925
1.13878
M 30 X 1.5
28.994
1.14150
28.844
1.13559
29.026
1.14276
29.226
1.15063
M 33 X 2.0
31.663
1.24657
31.493
1.23988
31.701
1.24807
31.925
1.25689
M 35 X 1.5
33.994
1.33835
33.844
1.33244
34.026
1.33961
34.226
1.34748
M 36 X 4.0
33.342
1.31268
33.118
1.30386
33.402
1.31504
33.702
1.32685
M 36 X 2.0
34.663
1.36469
34.493
1.35799
34.701
1.36618
34.925
1.37500
M 39 X 2.0
37.663
1.48280
37.493
1.47610
37.701
1.48429
37.925
1.49311
ANSI / ASME B1.13M-1995, Metric Screw Threads – M Profile
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