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Unified Thread Gages Pitch Diameter Chart - Thread Work Plugs |
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NOMINAL SIZE
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Go Basic
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NoGo 2B
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NoGo 3B
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0-80 UNF
|
.0519
|
.0542
|
.0536
|
|
1-64 UNC
|
.0629
|
.0655
|
.0648
|
|
1-72 UNF
|
.0640
|
.0665
|
.0659
|
|
2-56 UNC
|
.0744
|
.0772
|
.0765
|
|
2-64 UNF
|
.0759
|
.0786
|
.0779
|
|
3-48 UNC
|
.0855
|
.0885
|
.0877
|
|
3-56 UNF
|
.0874
|
.0902
|
.0895
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|
4-40 UNC
|
.0958
|
.0991
|
.0982
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4-48 UNF
|
.0985
|
.1016
|
.1008
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5-40 UNC
|
.1088
|
.1121
|
.1113
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5-44 UNF
|
.1102
|
.1134
|
.1126
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6-32 UNC
|
.1177
|
.1214
|
.1204
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|
6-40 UNF
|
.1218
|
.1252
|
.1243
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|
8-32 UNC
|
.1437
|
.1475
|
.1465
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|
8-36 UNF
|
.1460
|
.1496
|
.1487
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10-24 UNC
|
.1629
|
.1672
|
.1661
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10-32 UNF
|
.1697
|
.1736
|
.1726
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|
12-24 UNC
|
.1889
|
.1933
|
.1922
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|
12-28 UNF
|
.1928
|
.1970
|
.1959
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|
12-32 UNEF
|
.1957
|
.1998
|
.1988
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|
1/4-20 UNC
|
.2175
|
.2224
|
.2211
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|
1/4-28 UNF
|
.2268
|
.2311
|
.2300
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1/4-32 UNEF
|
.2297
|
.2339
|
.2328
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5/16-18 UNC
|
.2764
|
.2817
|
.2803
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5/16-24 UNF
|
.2854
|
.2902
|
.2890
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5/16-32 UNEF
|
.2922
|
.2964
|
.2953
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3/8-16 UNC
|
.3344
|
.3401
|
.3387
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3/8-24 UNF
|
.3479
|
.3528
|
.3516
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3/8-32 UNEF
|
.3547
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.3591
|
.3580
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7/16-14 UNC
|
.3911
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.3972
|
.3957
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7/16-20 UNF
|
.4050
|
.4104
|
.4091
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7/16-28 UNEF
|
.4143
|
.4189
|
.4178
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1/2-13 UNC
|
.4500
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.4565
|
.4548
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1/2-20 UNF
|
.4675
|
.4731
|
.4717
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1/2-28 UNEF
|
.4768
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.4816
|
.4804
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9/16-12 UNC
|
.5084
|
.5152
|
.5135
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9/16-18 UNF
|
.5264
|
.5323
|
.5308
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9/16-24 UNEF
|
.5354
|
.5405
|
.5392
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5/8-11 UNC
|
.5660
|
.5732
|
.5714
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5/8-18 UNF
|
.5889
|
.5949
|
.5934
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|
5/8-24 UNEF
|
.5979
|
.6031
|
.6018
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|
11/16-24 UNEF
|
.6604
|
.6656
|
.6643
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3/4-10 UNC
|
.6850
|
.6927
|
.6907
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3/4-16 UNF
|
.7094
|
.7159
|
.7143
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3/4-20 UNEF
|
.7175
|
.7232
|
.7218
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|
13/16-20 UNEF
|
.7800
|
.7857
|
.7843
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7/8-9 UNC
|
.8028
|
.8110
|
.8089
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|
7/8-14 UNF
|
.8286
|
.8356
|
.8339
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|
7/8-20 UNEF
|
.8425
|
.8482
|
.8468
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|
15/16-20 UNEF
|
.9050
|
.9109
|
.9094
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1-8 UNC
|
.9188
|
.9276
|
.9254
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1-12 UNF
|
.9459
|
.9535
|
.9516
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|
1-14 UNS
|
.9536
|
.9609
|
.9590
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1-20 UNEF
|
.9675
|
.9734
|
.9719
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1 1/16-12 UNF
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1.0084
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1.0158
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1.0139
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1 1/16-18 UNEF
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1.0264
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1.0326
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1.0310
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1 1/8-7 UNC
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1.0322
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1.0416
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1.0393
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1 1/8-12 UNF
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1.0709
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1.0787
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1.0768
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1 1/8-18 UNEF
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1.0889
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1.0951
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1.0935
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1 3/16-12 UNF
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1.1334
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1.1409
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1.1390
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1 3/16-18 UNEF
|
1.1514
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1.1577
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1.1561
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1 1/4-7 UNC
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1.1572
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1.1668
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1.1644
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1 1/4-12 UNF
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1.1959
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1.2039
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1.2019
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1 1/4-18 UNEF
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1.2139
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1.2202
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1.2186
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1 5/16-12 UNF
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1.2584
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1.2659
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1.2640
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1 5/16-18 UNEF
|
1.2764
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1.2827
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1.2811
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1 3/8-6 UNC
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1.2667
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1.2771
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1.2745
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1 3/8-12 UNF
|
1.3209
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1.3291
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1.3270
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1 3/8-18 UNEF
|
1.3389
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1.3452
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1.3436
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1 7/16-12 UNF
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1.3834
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1.3910
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1.3891
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1 7/16-18 UNEF
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1.4014
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1.4079
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1.4062
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1 1/2-6 UNC
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1.3917
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1.4022
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1.3996
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1 1/2-12 UNF
|
1.4459
|
1.4542
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1.4522
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1 1/2-18 UNEF
|
1.4639
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1.4704
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1.4687
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