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Metric Thread Gages

Pitch Diameter Chart - Thread Work Plugs


METRIC
DECIMAL REF. ONLY
NOMINAL SIZE
Go 6H
NoGo 6H
Go 6H
NoGo 6H
1.6x.35
1.373
1.458
.05406
.05740
1.8x.35
1.573
1.658
.06193
.06528
2x.4
1.740
1.830
.06850
.07205
2.2x.45
1.908
2.003
.07512
.07886
2.5x.45
2.208
2.303
.08693
.09067
3x.5
2.675
2.775
.10531
.10925
3.5x.6
3.110
3.222
.12244
.12685
4x.7
3.545
3.663
.13957
.14421
4.5x.75
4.013
4.131
.15799
.16264
5x.8
4.480
4.6505
.17638
.18130
5.5x.75
5.013
5.131
.19736
.20201
6x1.0
5.350
5.500
.21063
.21654
6.3x1.0
5.650
5.800
.22244
.22835
7x1.0
6.350
6.500
.25000
.25591
8x1.25
7.188
7.348
.28299
.28929
8x1.0
7.350
7.500
.28937
.29528
9x1.25
8.188
8.348
.32236
.32866
10x.75
9.513
9.645
.37453
.37972
10x1.5
9.026
9.206
.35535
.36244
10x1.25
9.188
9.348
.36173
.36803
11x1.5
10.026
10.206
029472
.40181
12x1.0
11.350
11.510
.44685
.45315
12x1.50
11.026
11.216
.43409
.44157
12x1.75
10.863
11.063
.42768
.43555
12x1.25
11.188
11.368
.44047
.44756
14x2.0
12.701
12.913
.50004
.50838
14x1.5
13.026
13.216
.51283
.52031
15x1.5
14.026
14.216
.55220
.55968
15x1.0
14.350
14.510
.56496
.57126
16x2.0
14.701
14.913
.57878
.58712
16x1.5
15.026
15.216
.59157
.59905
17x1.0
16.350
16.510
.64370
.65000
17x1.5
16.026
16.216
.63094
.63842
18x2.5
16.376
16.600
.64472
.65354
18x1.5
17.026
17.216
.67031
.67779
20x1.0
19.350
19.510
.76181
.7681
20x2.5
18.376
18.600
.72346
.73228
20x1.5
19.026
19.216
.74905
.75653
22x2.5
20.376
20.600
.80220
.81102
22x1.5
21.026
21.216
.82779
.83527
24x3.0
22.051
22.316
.86815
.87858
24x2.0
22.701
22.925
.89374
.90256
25x2.0
23.701
23.925
.93311
.94193
25x1.5
24.026
24.226
.94590
.95378
26x1.5
25.026
25.226
.98527
.99315
26x1.0
25.350
25.520
.99803
1.00472
27x3.0
25.051
25.316
.98626
.99669
27x2.0
25.701
25.925
1.01185
1.02067
28x2.0
26.701
26.925
1.05122
1.06004
28x1.5
27.026
27.226
1.06401
1.07189
28x1.0
27.350
27.520
1.07677
1.08346
30x1.5
29.026
29.226
1.14276
1.15063
30x3.5
27.727
28.007
1.09161
1.10264
30x2.0
28.701
28.925
1.2996
1.13878
32x2.0
30.701
30.925
1.20870
1.21752
32x1.5
31.026
31.226
1.22149
1.22937
33x3.5
30.727
31.007
1.20972
1.22075
33x2.0
31.701
31.925
1.24807
1.25689
35x1.5
34.026
34.226
1.33960
1.34748
36x2.0
34.701
34.925
1.36618
1.37500
36x4.0
33.402
33.702
1.31504
1.32685
36x3.0
34.051
34.316
1.34059
1.35102
38x1.5
37.026
37.226
1.45771
1.46559
39x2.0
37.701
37.925
1.48429
1.49311

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