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UN Work Plugs
UN Rings
UN Set Plugs
Metric Work Plugs
Metric Rings
Metric Set Plugs
UN Series Work Plugs

Unified Inch Thread Plug Gages

NOMINAL SIZE 1B or 2B or 3B GO 2B NOGO 3B NOGO
# 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
# 4-40 UNC .0958 .0991 .0982
# 4-48 UNF .0985 .1016 .1008
# 5-40 UNC .1088 .1121 .1113
# 5-44 UNF .1102 .1134 .1126
# 6-32 UNC .1177 .1214 .1204
# 6-40 UNF .1218 .1252 .1243
# 8-32 UNC .1437 .1475 .1465
# 8-36 UNF .1460 .1496 .1487
# 10-24 UNC .1629 .1672 .1661
# 10-32 UNF .1697 .1736 .1726
# 12-24 UNC .1889 .1933 .1922
# 12-28 UNF .1928 .1970 .1959
# 12-32 UNEF .1957 .1998 .1988
1/4"-20 UNC .2175 .2224 .2211
1/4"-28 UNF .2268 .2311 .2300
1/4"-32 UNEF .2297 .2339 .2328
5/16"-18 UNC .2764 .2817 .2803
5/16"-24 UNF .2854 .2902 .2890
5/16"-32 UNEF .2922 .2964 .2953
3/8"-16 UNC .3344 .3401 .3387
3/8"-24 UNF .3479 .3528 .3516
3/8"-32 UNEF .3547 .3591 .3580
7/16"-14 UNC .3911 .3972 .3957
7/16"-20 UNF .4050 .4104 .4091
7/16"-28 UNEF .4143 .4189 .4178
1/2"-13 UNC .4500 .4565 .4548
1/2"-20 UNF .4675 .4731 .4717
1/2"-28 UNEF .4768 .4816 .4804
9/16"-12 UNC .5084 .5152 .5135
9/16"-18 UNF .5264 .5323 .5308
9/16"-24 UNEF .5354 .5405 .5392
5/8"-11 UNC .5660 .5732 .5714
5/8"-18 UNF .5889 .5949 .5934
5/8"-24 UNEF .5979 .6031 .6018
11/16"-24 UNEF .6604 .6656 .6643
3/4"-10 UNC .6850 .6927 .6907
3/4"-16 UNF .7094 .7159 .7143
3/4"-20 UNEF .7175 .7232 .7218
13/16"-20 UNEF .7800 .7857 .7843
7/8"-9 UNC .8028 .8110 .8089
7/8"-14 UNF .8286 .8356 .8339
7/8"-20 UNEF .8425 .8482 .8468
15/16"-20 UNEF .9050 .9109 .9094
1"-8 UNC .9188 .9276 .9254
1"-12 UNF .9459 .9535 .9516
1"-14 UNS .9536 .9609 .9590
1"-20 UNEF .9675 .9734 .9719
1-1/16"-12 UN 1.0084 1.0158 1.0139
1-1/16"-18 UNEF 1.0264 1.0326 1.0310
1-1/8"-7 UNC 1.0322 1.0416 1.0393
1-1/8"-12 UNF 1.0709 1.0787 1.0768
1-1/8"-18 UNEF 1.0889 1.0951 1.0935
1-3/16"-12 UN 1.1334 1.1409 1.1390
1-3/16"-18 UNEF 1.1514 1.1577 1.1561
1-1/4"-7 UNC 1.1572 1.1668 1.1644
1-1/4"-12 UNF 1.1959 1.2039 1.2019
1-1/4"-18 UNEF 1.2139 1.2202 1.2186
1-5/16"-12 UN 1.2584 1.2659 1.2640
1-5/16"-18 UNEF 1.2764 1.2827 1.2811
1-3/8"-6 UNC 1.2667 1.2771 1.2745
1-3/8"-12 UNF 1.3209 1.3291 1.3270
1-3/8"-18 UNEF 1.3389 1.3452 1.3436
1-7/16"-12 UN 1.3834 1.3910 1.3891
1-7/16"-18 UNEF 1.4014 1.4079 1.4062
1-1/2"-6 UNC 1.3917 1.4022 1.3996
1-1/2"-12 UNF 1.4459 1.4542 1.4522
1-1/2"-18 UNEF 1.4639 1.4704 1.4687
 
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6701 Old 28th St SE, Suite B
Grand Rapids, MI 49546-6937
Phone: 001-616-954-6581 • Fax: 001-616-954-6583
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