Limiting Dimensions Thread Plug Gages

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Thread Work Plug Gages Thread Ring and Setting Plugs
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Basic Class 2B Class 3B Nom. Size Class 2A Class 3A Class 2A Class 3A
.0519 .0542 .0536 .060 (0) 80 UNF .0514 .0519 .0496 .0506
.0629 .0655 .0648 .073 (1) 64 UNC .0623 .0629 .0603 .0614
.0640 .0665 .0659 .073 (1) 72 UNF .0634 .0640 .0615 .0626
.0744 .0772 .0765 .086 (2) 56 UNC .0738 .0744 .0717 .0728
.0759 .0786 .0779 .086 (2) 64 UNF .0753 .0759 .0733 .0744
.0855 .0885 .0877 .099 (3) 48 UNC .0848 .0855 .0825 .0838
.0874 .0902 .0895 .099 (3) 56 UNF .0867 .0874 .0845 .0858
.0958 .0991 .0982 .112 (4) 40 UNC .0950 .0958 .0925 .0939
.0985 .1016 .1008 .112(4)48 UNF .0978 .0985 .0954 .0967
.1088 .1121 .1113 .125 (5) 40 UNC .1080 .1088 .1054 .1069
.1102 .1134 .1126 .125 (5) 44 UNF .1095 .1102 .1070 .1038
.1177 .1214 .1204 .138 (6) 32 UNC .1169 .1177 .1141 .1156
.1218 .1252 .1243 .138 (6) 40 UNF .1210 .1218 .1184 .1198
.1437 .1475 .1465 .164 (8) 32 UNC .1428 .1437 .1399 .1415
.1460 .1496 .1487 .164 (8) 36 UNF .1452 .1460 .1424 .1439
.1629 .1672 .1661 .190 (10) 24 UNC .1619 .1629 .1586 .1604
.1697 .1736 .1726 .190 (10) 32 UNF .1688 .1697 .1658 .1674
.1889 .1933 .1922 .216 (12) 24 UNC .1879 .1889 .1845 .1863
.1928 .1970 .1959 .216 (12) 28 UNF .1918 .1928 .1886 .1904
.1957 .1998 .1988 .216 (12) 32 UNEF .1948 .1957 .1917 .1933
.2175 .2224 .2211 .2501 (1/4) 20 UNC .2164 .2175 .2127 .2147
.2268 .2311 .2300 .250 (1/4) 28 UNF .2258 .2268 .2225 .2243
.2297 .2339 .2328 .250 (1/4) 32 UNEF .2287 .2297 .2255 .2273
.2764 .2817 .2803 .3125 (5/16) 18 UNC .2752 .2764 .2712 .2734
.2854 .2902 .2890 .3125 (5/16) 24 UNF .2843 .2854 .2806 .2827
.2922 .2964 .2953 .3125 (5/16) 32 UNEF .2912 .2922 .2680 .2896
.3344 .3401 .3387 .375 (3/8) 16 UNC .3331 .3344 .3267 .3311
.3479 .3528 .3516 .375 (3/8) 24 UNF .3468 .3479 .3430 .3450
.3547 .3591 .3580 .375 (3/8) 32 UNEF .3537 .3547 .3503 .3522
.3911 .3972 .3957 .4375 (7/6) 14 UNC .3897 .3911 .3850 .3876
.4050 .4104 .4091 .4375 (7/6) 20 UNF .4037 .4050 .3995 .4019
.4143 .4198 .4178 .4375 (7/6) 28 UNEF .4132 .4143 .4096 .4116
.4500 .4565 .4548 .500 (1/2) 13 UNC .4485 .4500 .4435 .4463
.4675 .4731 .4717 .500 (1/2) 20 UNF .4662 .4675 .4619 .4643
.4768 .4816 .4804 .500 (1/2) 28 UNEF .4757 .4768 .4720 .4740
.5084 .5152 .5135 .5625 (9/16) 12 UNC .5068 .5084 .5016 .5045
.5264 .5323 .5308 .5625 (9/16) 18 UNEF .5250 .5264 .5205 .5230
.5354 .5405 .5392 .5625 (9/16) 24 UNEF .5342 .5354 .5303 .5325
.5660 .5732 .5714 .625 (5/8) 11 UNC .5644 .5660 .5589 .5619
.5889 .5949 .5934 .625 (5/8)18 UNF .5875 .5889 .5828 .5854
.5979 .6031 .6018 .625 (5/8) 24 UNEF .5967 .5979 .5927 .5949
.6604 .6656 .6643 .6875 (11/16) 24 UNEF .6592 .6604 .6552 .6574
.6850 .6927 .6907 .750 (3/4) 10 UNC .6832 .6850 .6773 .6806
.7094 .7159 .7143 .750 (3/4) 16 UNF .7079 .7094 .7029 .7056
.7175 .7232 .7218 .750 (3/4) 20 UNEF .7162 .7175 .7118 .7142
.7800 .7857 .7843 .8125 (13/16) 20 UNEF .7787 .7800 .7743 .7767
.8028 .8110 .8089 .875 (7/8) 9 UNC .8009 .8028 .7946 .7981
.8286 .8356 .8339 .875 (7/8) 14 UNF .8270 .8286 .8216 .8245
.8425 .8482 .8468 .875 (7/8) 20 UNEF .8412 .8425 .8368 .8392
.9050 .9109 .9094 .9375 (15/16) 20 UNEF .9036 .9050 .8991 .9016
.9188 .9276 .9254 1.000 (1) 8 UNC .9168 .9188 .9100 .9137
.9459 .9535 .9516 1.000 (1)12 UNF .9441 .9459 .9382 .9415
.9536 .9609 .9590 1.000 (1) 14 UNS .9519 .9536 .9463 .9494
.9675 .9734 .9719 1.000 (1) 20 UNEF .9661 .9675 .9616 .9641
1.0264 1.0326 1.0310 1.0625 (1 1/16) 18 UNEF 1.0250 1.0264 1.0203 1.0228
1.0322 1.0416 1.0393 1.125 (1 1/8) 7 UNC 1.0300 1.0322 1.0228 1.0268
1.0709 1.0787 1.0768 1.125 (1 1/8) 12 UNF 1.0691 1.0709 1.0631 1.0664
1.0889 1.0951 1.0935 1.125 (1 1/8) 18 UNEF 1.0875 1.0889 1.0828 1.0853
1.1514 1.1577 1.1561 1.1875 (1 3/16) 18 UNEF 1.1499 1.1514 1.1450 1.1478
1.1572 1.1668 1.1644 1.250 (1 1/4) 7 UNC 1.1550 1.1572 1.1476 1.1517
1.1959 1.2039 1.2019 1.250 (1 1/4) 12 UNF 1.1941 1.1959 1.1879 1.1913
1.2139 1.2202 1.2186 1.250 (1 1/4) 18 UNEF 1.2124 1.2139 1.2075 1.2103
1.2764 1.2827 1.2811 1.3125 (1 5/16) 18 UNEF 1.2749 1.2764 1.2700 1.2728
1.2667 1.2771 1.2745 1.375 (1 3/8) 6 UNC 1.2643 1.2667 1.2563 1.2607
1.3209 1.3291 1.3270 1.375 (1 3/8) 12 UNF 1.3190 1.3209 1.3127 1.3162
1.3389 1.3452 1.3436 1.375 (1 3/8) 18 UNEF 1.3374 1.3389 1.3325 1.3352
1.4014 1.4079 1.4062 1.4375 (1 7/16) 18 UNEF 1.3999 1.4014 1.3949 1.3977
1.3917 1.4022 1.3996 1.500 (1 1/2) 6 UNC 1.3893 1.3917 1.3812 1.3856
1.4459 1.4542 1.4522 1.500 (1 1/2) 12 UNF 1.440 1.4459 1.4376 1.4411
1.4639 1.4704 1.4687 1.500 (1 1/2) 18 UNEF 1.4624 1.4639 1.4574 1.4602
Thread Work Plug Gages Thread Ring and Setting Plugs
Go Hi Go Lo
Basic Class 2B Class 3B Nom. Size Class 2A Class 3A Class 2A Class 3A
.0519 .0542 .0536 .060 (0) 80 UNF .0514 .0519 .0496 .0506
.0629 .0655 .0648 .073 (1) 64 UNC .0623 .0629 .0603 .0614
.0640 .0665 .0659 .073 (1) 72 UNF .0634 .0640 .0615 .0626
.0744 .0772 .0765 .086 (2) 56 UNC .0738 .0744 .0717 .0728
.0759 .0786 .0779 .086 (2) 64 UNF .0753 .0759 .0733 .0744
.0855 .0885 .0877 .099 (3) 48 UNC .0848 .0855 .0825 .0838
.0874 .0902 .0895 .099 (3) 56 UNF .0867 .0874 .0845 .0858
.0958 .0991 .0982 .112 (4) 40 UNC .0950 .0958 .0925 .0939
.0985 .1016 .1008 .112(4)48 UNF .0978 .0985 .0954 .0967
.1088 .1121 .1113 .125 (5) 40 UNC .1080 .1088 .1054 .1069
.1102 .1134 .1126 .125 (5) 44 UNF .1095 .1102 .1070 .1038
.1177 .1214 .1204 .138 (6) 32 UNC .1169 .1177 .1141 .1156
.1218 .1252 .1243 .138 (6) 40 UNF .1210 .1218 .1184 .1198
.1437 .1475 .1465 .164 (8) 32 UNC .1428 .1437 .1399 .1415
.1460 .1496 .1487 .164 (8) 36 UNF .1452 .1460 .1424 .1439
.1629 .1672 .1661 .190 (10) 24 UNC .1619 .1629 .1586 .1604
.1697 .1736 .1726 .190 (10) 32 UNF .1688 .1697 .1658 .1674
.1889 .1933 .1922 .216 (12) 24 UNC .1879 .1889 .1845 .1863
.1928 .1970 .1959 .216 (12) 28 UNF .1918 .1928 .1886 .1904
.1957 .1998 .1988 .216 (12) 32 UNEF .1948 .1957 .1917 .1933
.2175 .2224 .2211 .2501 (1/4) 20 UNC .2164 .2175 .2127 .2147
.2268 .2311 .2300 .250 (1/4) 28 UNF .2258 .2268 .2225 .2243
.2297 .2339 .2328 .250 (1/4) 32 UNEF .2287 .2297 .2255 .2273
.2764 .2817 .2803 .3125 (5/16) 18 UNC .2752 .2764 .2712 .2734
.2854 .2902 .2890 .3125 (5/16) 24 UNF .2843 .2854 .2806 .2827
.2922 .2964 .2953 .3125 (5/16) 32 UNEF .2912 .2922 .2680 .2896
.3344 .3401 .3387 .375 (3/8) 16 UNC .3331 .3344 .3267 .3311
.3479 .3528 .3516 .375 (3/8) 24 UNF .3468 .3479 .3430 .3450
.3547 .3591 .3580 .375 (3/8) 32 UNEF .3537 .3547 .3503 .3522
.3911 .3972 .3957 .4375 (7/6) 14 UNC .3897 .3911 .3850 .3876
.4050 .4104 .4091 .4375 (7/6) 20 UNF .4037 .4050 .3995 .4019
.4143 .4198 .4178 .4375 (7/6) 28 UNEF .4132 .4143 .4096 .4116
.4500 .4565 .4548 .500 (1/2) 13 UNC .4485 .4500 .4435 .4463
.4675 .4731 .4717 .500 (1/2) 20 UNF .4662 .4675 .4619 .4643
.4768 .4816 .4804 .500 (1/2) 28 UNEF .4757 .4768 .4720 .4740
.5084 .5152 .5135 .5625 (9/16) 12 UNC .5068 .5084 .5016 .5045
.5264 .5323 .5308 .5625 (9/16) 18 UNEF .5250 .5264 .5205 .5230
.5354 .5405 .5392 .5625 (9/16) 24 UNEF .5342 .5354 .5303 .5325
.5660 .5732 .5714 .625 (5/8) 11 UNC .5644 .5660 .5589 .5619
.5889 .5949 .5934 .625 (5/8)18 UNF .5875 .5889 .5828 .5854
.5979 .6031 .6018 .625 (5/8) 24 UNEF .5967 .5979 .5927 .5949
.6604 .6656 .6643 .6875 (11/16) 24 UNEF .6592 .6604 .6552 .6574
.6850 .6927 .6907 .750 (3/4) 10 UNC .6832 .6850 .6773 .6806
.7094 .7159 .7143 .750 (3/4) 16 UNF .7079 .7094 .7029 .7056
.7175 .7232 .7218 .750 (3/4) 20 UNEF .7162 .7175 .7118 .7142
.7800 .7857 .7843 .8125 (13/16) 20 UNEF .7787 .7800 .7743 .7767
.8028 .8110 .8089 .875 (7/8) 9 UNC .8009 .8028 .7946 .7981
.8286 .8356 .8339 .875 (7/8) 14 UNF .8270 .8286 .8216 .8245
.8425 .8482 .8468 .875 (7/8) 20 UNEF .8412 .8425 .8368 .8392
.9050 .9109 .9094 .9375 (15/16) 20 UNEF .9036 .9050 .8991 .9016
.9188 .9276 .9254 1.000 (1) 8 UNC .9168 .9188 .9100 .9137
.9459 .9535 .9516 1.000 (1)12 UNF .9441 .9459 .9382 .9415
.9536 .9609 .9590 1.000 (1) 14 UNS .9519 .9536 .9463 .9494
.9675 .9734 .9719 1.000 (1) 20 UNEF .9661 .9675 .9616 .9641
1.0264 1.0326 1.0310 1.0625 (1 1/16) 18 UNEF 1.0250 1.0264 1.0203 1.0228
1.0322 1.0416 1.0393 1.125 (1 1/8) 7 UNC 1.0300 1.0322 1.0228 1.0268
1.0709 1.0787 1.0768 1.125 (1 1/8) 12 UNF 1.0691 1.0709 1.0631 1.0664
1.0889 1.0951 1.0935 1.125 (1 1/8) 18 UNEF 1.0875 1.0889 1.0828 1.0853
1.1514 1.1577 1.1561 1.1875 (1 3/16) 18 UNEF 1.1499 1.1514 1.1450 1.1478
1.1572 1.1668 1.1644 1.250 (1 1/4) 7 UNC 1.1550 1.1572 1.1476 1.1517
1.1959 1.2039 1.2019 1.250 (1 1/4) 12 UNF 1.1941 1.1959 1.1879 1.1913
1.2139 1.2202 1.2186 1.250 (1 1/4) 18 UNEF 1.2124 1.2139 1.2075 1.2103
1.2764 1.2827 1.2811 1.3125 (1 5/16) 18 UNEF 1.2749 1.2764 1.2700 1.2728
1.2667 1.2771 1.2745 1.375 (1 3/8) 6 UNC 1.2643 1.2667 1.2563 1.2607
1.3209 1.3291 1.3270 1.375 (1 3/8) 12 UNF 1.3190 1.3209 1.3127 1.3162
1.3389 1.3452 1.3436 1.375 (1 3/8) 18 UNEF 1.3374 1.3389 1.3325 1.3352
1.4014 1.4079 1.4062 1.4375 (1 7/16) 18 UNEF 1.3999 1.4014 1.3949 1.3977
1.3917 1.4022 1.3996 1.500 (1 1/2) 6 UNC 1.3893 1.3917 1.3812 1.3856
1.4459 1.4542 1.4522 1.500 (1 1/2) 12 UNF 1.440 1.4459 1.4376 1.4411
1.4639 1.4704 1.4687 1.500 (1 1/2) 18 UNEF 1.4624 1.4639 1.4574 1.4602
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