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Metric Thread Gages

Pitch Diameter Chart - Thread Ring and Setting Plugs


METRIC
DECIMAL REF. ONLY
NOMINAL SIZE
Go 6H
NoGo 6H
Go 6H
NoGo 6H
1.6x.35
1.354
1.291
.05331
.05083
1.8x.35
1.554
1.491
.06118
.0570
2x.4
1.721
1.654
.06776
.06512
2.2x.45
1.888
1.817
.07433
.07154
2.5x.45
2.188
2.117
.08614
.08335
3x.5
2.655
2.580
.10453
.10157
3.5x.6
3.089
3.004
.12161
.11827
4x.7
3.523
3.433
.13870
.13516
4.5x.75
3.991
3.901
.15713
.15358
5x.8
4.456
4.361
.17543
.17169
5.5x.75
4.991
4.901
.19650
.19295
6x1.0
5.324
5.212
.20961
.20520
6.3x1.0
5.624
5.512
.22142
.21701
7x1.0
6.324
6.212
.24898
.24457
8x1.25
7.160
7.042
.28189
.27724
8x1.0
7.324
7.212
.28835
.28394
9x1.25
8.160
8.042
.32126
.31661
10x.75
9.491
9.391
.37366
.36972
10x1.5
8.994
8.862
.35409
.34890
10x1.25
9.160
9.042
.36063
.35598
11x1.5
9.994
9.862
.39346
.38827
12x1.0
11.324
11.206
.44583
.44118
12x1.50
10.994
10.854
.43283
.42732
12x1.75
10.829
10.679
.42634
.42043
12x1.25
11.160
11.028
.43937
.43417
14x2.0
12.663
12.503
.49854
.49224
14x1.5
12.994
12.854
.51157
.50606
15x1.5
13.994
13.854
.55094
.54543
15x1.0
14.324
14.206
.56394
.55929
16x2.0
14.663
14.503
.57728
.57098
16x1.5
14.994
14.854
.59031
.58480
17x1.0
16.324
16.206
.64268
.63803
17x1.5
15.994
15.854
.62968
.62417
18x2.5
16.334
16.164
.64307
.63638
18x1.5
16.994
16.854
.66905
.66354
20x1.0
19.324
19.206
.76079
.75614
20x2.5
18.334
18.164
.72181
.71512
20x1.5
18.994
18.854
.74779
.74228
22x2.5
20.334
20.164
.80055
.79386
22x1.5
20.994
20.854
.82653
.82102
24x3.0
22.003
21.803
.86626
.85838
24x2.0
22.663
22.493
.89224
.88555
25x2.0
23.663
23.493
.93161
.92492
25x1.5
23.994
23.844
.94464
.93874
26x1.5
24.994
24.844
.98401
.97811
26x1.0
25.324
25.212
.99701
.99260
27x3.0
25.003
24.803
.98437
.97649
27x2.0
25.663
25.493
1.01035
1.00366
28x2.0
26.663
26.493
1.04972
1.04303
28x1.5
26.994
26.844
1.07625
1.05684
28x1.0
27.324
27.199
1.07575
1.07082
30x1.5
28.994
28.844
1.14150
1.13559
30x3.5
27.674
27.462
1.08953
1.08118
30x2.0
28.663
28.493
1.12846
1.12177
32x2.0
30.663
30.493
1.20720
1.20051
32x1.5
30.994
30.844
1.22023
1.21432
33x3.5
30.674
30.462
1.20764
1.19929
33x2.0
31.663
31.493
1.24657
1.23988
35x1.5
33.994
33.844
1.33834
1.33244
36x2.0
34.663
34.493
1.36469
1.35799
36x4.0
33.342
33.118
1.31267
1.30386
36x3.0
34.003
33.803
1.33870
1.33082
38x1.5
36.994
36.844
1.45645
1.45055
39x2.0
37.663
37.493
1.48280
1.47610

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