Jan 21st 2018
UN Thread Ring Gage Pitch Diameters
UN Thread Ring Gages
| Size | 2A Go Member | 2A No Go Member | 3A Go Member | 3A No Go Member | |
| #0 - 80 UNF | 0.0514 | 0.0496 | 0.0519 | 0.0506 | |
_______________ | _______________ | _______________ | _______________ | ||
| #1 - 64 UNC | 0.0623 | 0.0603 | 0.0629 | 0.0614 | |
_______________ | _______________ | _______________ | _______________ | ||
| #1 - 72 UNF | 0.0634 | 0.0615 | 0.0640 | 0.0626 | |
_______________ | _______________ | _______________ | _______________ | ||
| #2 - 56 UNC | 0.0738 | 0.0717 | 0.0744 | 0.0728 | |
_______________ | _______________ | _______________ | _______________ | ||
| #2 - 64 UNF | 0.0753 | 0.0733 | 0.0759 | 0.0744 | |
| _______________ | _______________ | _______________ | _______________ | ||
| #3 - 48 UNC | 0.0848 | 0.0825 | 0.0855 | 0.0838 | |
_______________ | _______________ | _______________ | _______________ | ||
| #3 - 56 UNF |
0.0867 |
0.0845 |
0.0874 |
0.0858 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| #4 - 40 UNC |
0.0950 |
0.0925 |
0.0958 |
0.0939 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| #4 - 48 UNF |
0.0978 |
0.0954 |
0.0985 |
0.0967 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| #5 - 40 UNC |
0.1080 |
0.1054 |
0.1088 |
0.1069 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| #5 - 44 UNF |
0.1095 |
0.1070 |
0.1102 |
0.1083 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| #6 - 32 UNC |
0.1169 |
0.1141 |
0.1177 |
0.1156 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| #6 - 40 UNF |
0.1210 |
0.1184 |
0.1218 |
0.1198 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| #8 - 32 UNC |
0.1428 |
0.1399 |
0.1437 |
0.1415 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| #8 - 36 UNF |
0.1452 |
0.1424 |
0.1460 |
0.1439 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| #10 - 24 UNC |
0.1619 |
0.1586 |
0.1629 |
0.1604 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| #10 - 32 UNF |
0.1688 |
0.1658 |
0.1697 |
0.1674 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| #12 - 24 UNC |
0.1879 |
0.1845 |
0.1889 |
0.1863 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| #12 - 28 UNF | 0.1918 | 0.1886 | 0.1928 | 0.1904 | |
| _______________ | _______________ | _______________ | _______________ | ||
| #12 - 32 UNEF | 0.1948 | 0.1917 | 0.1957 | 0.1933 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 1/4 - 20 UNC | 0.2164 | 0.2127 | 0.2175 | 0.2147 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 1/4 - 28 UNF | 0.2258 | 0.2225 | 0.2268 | 0.2243 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 1/4 - 32 UNEF | 0.2287 | 0.2255 | 0.2297 | 0.2273 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 5/16 - 18 UNC | 0.2752 | 0.2712 | 0.2764 | 0.2734 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 5/16 - 24 UNF | 0.2843 | 0.2806 | 0.2854 | 0.2827 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 5/16 - 32 UNEF | 0.2912 | 0.2880 | 0.2922 | 0.2898 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 3/8 - 16 UNC | 0.3331 | 0.3287 | 0.3344 | 0.3311 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 3/8 - 24 UNF | 0.3468 | 0.3430 | 0.3479 | 0.3450 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 3/8 - 32 UNEF | 0.3537 | 0.3503 | 0.3547 | 0.3522 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 7/16 - 14 UNC | 0.3897 | 0.3850 | 0.3911 | 0.3876 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 7/16 - 20 UNF | 0.4037 | 0.3995 | 0.4050 | 0.4019 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 7/16 - 28 UNEF | 0.4132 | 0.4096 | 0.4143 | 0.4116 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 1/2 - 13 UNC | 0.4485 | 0.4435 | 0.4500 | 0.4463 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 1/2 - 20 UNF | 0.4662 | 0.4619 | 0.4675 | 0.4643 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 1/2 - 28 UNEF | 0.4757 | 0.4720 | 0.4768 | 0.4740 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 9/16 - 12 UNC |
0.5068 |
0.5016 |
0.5084 |
0.5045 | |
_______________ | _______________ | _______________ | _______________ | ||
| 9/16 - 18 UNF |
0.5250 |
0.5205 |
0.5264 |
0.5230 | |
_______________ | _______________ | _______________ | _______________ | ||
| 9/16 - 24 UNEF |
0.5342 |
0.5303 |
0.5354 |
0.5325 | |
_______________ | _______________ | _______________ | _______________ | ||
| 5/8 - 11 UNC |
0.5644 |
0.5589 |
0.5660 |
0.5619 | |
_______________ | _______________ | _______________ | _______________ | ||
| 5/8 - 18 UNF |
0.5875 |
0.5828 |
0.5889 |
0.5854 | |
_______________ | _______________ | _______________ | _______________ | ||
| 5/8 - 24 UNEF |
0.5967 |
0.5927 |
0.5979 |
0.5949 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 11/16 - 24 UNEF |
0.6592 |
0.6552 |
0.6604 |
0.6574 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 3/4 - 10 UNC |
0.6832 |
0.6773 |
0.6850 |
0.6806 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 3/4 - 16 UNF |
0.7079 |
0.7029 |
0.7094 |
0.7056 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 3/4 - 20 UNEF |
0.7162 |
0.7118 |
0.7175 |
0.7142 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 13/16 - 20 UNEF |
0.7787 |
0.7743 |
0.7800 |
0.7767 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 7/8 - 9 UNC |
0.8009 |
0.7946 |
0.8028 |
0.7981 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 7/8 - 14 UNF |
0.8270 |
0.8216 |
0.8286 |
0.8245 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 7/8 - 20 UNEF |
0.8412 |
0.8368 |
0.8425 |
0.8392 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 15/16 - 20 UNEF |
0.9036 |
0.8991 |
0.9050 |
0.9016 | |
| _______________ | _______________ | _______________ | _______________ | ||
| 1" - 8 UNC |
0.9168 |
0.9100 |
0.9188 |
0.9137 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1" - 12 UNF |
0.9441 |
0.9382 |
0.9459 |
0.9415 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1" - 14 UNS |
0.9519 |
0.9463 |
0.9536 |
0.9494 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1" - 20 UNEF |
0.9661 |
0.9616 |
0.9675 |
0.9641 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1 1/16 - 12 UN |
1.0067 |
1.0010 |
1.0084 |
1.0042 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1 1/16 - 18 UNEF |
1.0250 |
1.0203 |
1.0264 |
1.0228 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1 1/8 - 7 UNC |
1.0300 |
1.0228 |
1.0322 |
1.0268 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1 1/8 - 12 UNF |
1.0691 |
1.0631 |
1.0709 |
1.0664 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1 1/8 - 18 UNEF |
1.0875 |
1.0828 |
1.0889 |
1.0853 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1 3/16 - 12 UN |
1.1317 |
1.1259 |
1.1334 |
1.1291 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1 3/16 - 18 UNEF |
1.1499 |
1.1450 |
1.1514 |
1.1478 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1 1/4 - 7 UNC |
1.1550 |
1.1476 |
1.1572 |
1.1517 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1 1/4 - 12 UNF |
1.1941 |
1.1879 |
1.1959 |
1.1913 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1 1/4 - 18 UNEF |
1.2124 |
1.2075 |
1.2139 |
1.2103 | |
_______________ | _______________ | _______________ | _______________ | ||
| 1 5/16 - 12 UN |
1.2567 |
1.2509 |
1.2584 |
1.2541 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| 1 5/16 - 18 UNEF |
1.2749 |
1.2700 |
1.2764 |
1.2728 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| 1 3/8 - 6 UNC |
1.2643 |
1.2563 |
1.2667 |
1.2607 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| 1 3/8 - 12 UNF |
1.3190 |
1.3127 |
1.3209 |
1.3162 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| 1 3/8 - 18 UNEF |
1.3374 |
1.3325 |
1.3389 |
1.3353 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| 1 7/16 - 12 UN |
1.3816 |
1.3757 |
1.3834 |
1.3790 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| 1 7/16 - 18 UNEF |
1.3999 |
1.3949 |
1.4014 |
1.3977 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| 1 1/2 - 6 UNC |
1.3893 |
1.3812 |
1.3917 |
1.3856 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| 1 1/2 - 12 UNF |
1.4440 |
1.4376 |
1.4459 |
1.4411 | |
|
_______________ |
_______________ |
_______________ |
_______________ | ||
| 1 1/2 - 18 UNEF |
1.4624 |
1.4574 |
1.4639 |
1.4602 |