|
Standard
Pitch diameters for 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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