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Technical Data

Surface Treatments

ENGINEERING DATA-GAGES
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THREAD RING & SETTING PLUG PITCH DIAMETERS

UNIFIED PITCH DIAMETERS

X TOL.

NOMINAL GO NO GO GO = -

SIZE CLASS 3A CLASS 2A CLASS 2A CLASS 3A NO GO = +

0-80 UNF .0519 .0514 .0496 .0506 .0002

1-64 UNC .0629 .0623 .0603 .0614 .0002

1-72 UNF .0640 .0634 .0615 .0626 .0002

2-56 UNC .0744 .0738 .0717 .0728 .0002

2-64 UNF .0759 .0753 .0733 .0744 .0002

3-48 UNC .0855 .0848 .0825 .0838 .0002

3-56 UNF .0874 .0867 .0845 .0858 .0002

4-40 UNC .0958 .0950 .0925 .0939 .0002

4-48 UNF .0985 .0978 .0954 .0967 .0002

5-40 UNC .1088 .1080 .1054 .1069 .0002

5-44 UNF .1102 .1095 .1070 .1082 .0002

6-32 UNC .1177 .1169 .1141 .1156 .0003

6-40 UNF .1218 .1210 .1184 .1198 .0002

8-32 UNC .1437 .1428 .1399 .1415 .0003

8-36 UNF .1460 .1452 .1424 .1439 .0002

10-24 UNC .1629 .1619 .1586 .1604 .0003

10-32 UNF .1697 .1688 .1658 .1674 .0003

12-24 UNC .1889 .1879 .1845 .1863 .0003

12-28 UNF .1928 .1918 .1886 .1904 .0003

12-32 UNEF .1957 .1948 .1917 .1933 .0003

1/4-20 UNC .2175 .2164 .2127 .2147 .0003

1/4-28 UNF .2268 .2258 .2225 .2243 .0003

1/4-32 UNEF .2297 .2287 .2255 .2273 .0003

5/16-18 UNC .2764 .2752 .2712 .2734 .0003

5/16-24 UNF .2854 .2843 .2806 .2827 .0003

5/16-32 UNEF .2922 .2912 .2880 .2898 .0003

3/8-16 UNC .3344 .3331 .3287 .3311 .0003

3/8-24 UNF .3479 .3468 .3430 .3450 .0003

3/8-32 UNEF .3547 .3537 .3503 .3522 .0003

7/16-14 UNC .3911 .3897 .3850 .3876 .0003

7/16-20 UNF .4050 .4037 .3995 .4019 .0003

7/16-28 UNEF .4143 .4132 .4096 .4116 .0003

1/2-13 UNC .4500 .4485 .4435 .4463 .0003

1/2-20 UNF .4675 .4662 .4619 .4643 .0003

1/2-28 UNEF .4768 .4757 .4720 .4740 .0003

9/16-12 UNC .5084 .5068 .5016 .5045 .0003

9/16-18 UNF .5264 .5250 .5205 .5230 .0003

9/16-24 UNEF .5354 .5342 .5303 .5325 .0003

5/8-11 UNC .5660 .5644 .5589 .5619 .0003

5/8-18 UNF .5889 .5875 .5828 .5854 .0003

5/8-24 UNEF .5979 .5967 .5927 .5949 .0003

11/16-24 UNEF .6604 .6592 .6552 .6574 .0003

3/4-10 UNC .6850 .6832 .6773 .6806 .0003

3/4-16 UNF .7094 .7079 .7029 .7056 .0003

3/4-20 UNEF .7175 .7162 .7118 .7142 .0003

13/16-20 UNEF .7800 .7787 .7743 .7767 .0003

7/8-9 UNC .8028 .8009 .7946 .7981 .0003

7/8-14 UNF .8286 .8270 .8216 .8245 .0003

7/8-20 UNEF .8425 .8412 .8368 .8392 .0003

15/16-20 UNEF .9050 .9036 .8991 .9016 .0003

1-8 UNC .9188 .9168 .9100 .9137 .0004

1-12 UNF .9459 .9441 .9382 .9415 .0003

1-14 UNS .9536 .9519 .9463 .9494 .0003

1-20 UNEF .9675 .9661 .9616 .9641 .0003

1 1/16-18 UNEF 1.0264 1.0250 1.0203 1.0228 .0003

1 1/8-7 UNC 1.0322 1.0300 1.0228 1.0268 .0004

1 1/8-12 UNF 1.0709 1.0691 1.0631 1.0664 .0003

1 1/8-18 UNEF 1.0889 1.0875 1.0828 1.0853 .0003

1 3/16-18 UNEF 1.1514 1.1499 1.1450 1.1478 .0003

1 1/4-7 UNC 1.1572 1.1550 1.1476 1.1517 .0004

1 1/4-12 UNF 1.1959 1.1941 1.1879 1.1913 .0003

1 1/4-18 UNEF 1.2139 1.2124 1.2075 1.2103 .0003

1 5/16-18 UNEF 1.2764 1.2749 1.2700 1.2728 .0003

1 3/8-6 UNC 1.2667 1.2643 1.2563 1.2607 .0004

1 3/8-12 UNF 1.3209 1.3190 1.3127 1.3162 .0003

1 3/8-18 UNEF 1.3389 1.3374 1.3325 1.3353 .0003

1 7/16-18 UNEF 1.4014 1.3999 1.3949 1.3977 .0003

1 1/2-6 UNC 1.3917 1.3893 1.3812 1.3856 .0004

1 1/2-12 UNF 1.4459 1.4440 1.4376 1.4411 .0003

1 1/2-18 UNEF 1.4639 1.4624 1.4574 1.4602 .0003

THREAD PLUG GAGE PITCH

DIAMETERS

GO BASIC UNIFIED PITCH DIAMETERS

NOMINAL ALL NO GO X TOL. X X + -

SIZE CLASSES GO = + LEAD HALF ANGLE

ALL SERIES CL. 2B CL. 3B NO GO = - TOL. TOL.

0-80 UNF .0519 .0542 .0536 .0002 .0002 0° 30'

1-64 UNC .0629 .0655 .0648 .0002 .0002 0° 30'

1-72 UNF .0640 .0665 .0659 .0002 .0002 0° 30'

2-56 UNC .0744 .0772 .0765 .0002 .0002 0° 30'

2-64 UNF .0759 .0786 .0779 .0002 .0002 0° 30'

3-48 UNC .0855 .0885 .0877 .0002 .0002 0° 30'

3-56 UNF .0874 .0902 .0895 .0002 .0002 0° 30'

4-40 UNC .0958 .0991 .0982 .0002 .0002 0° 20'

4-48 UNF .0985 .1016 .1008 .0002 .0002 0° 30'

5-40 UNC .1088 .1121 .1113 .0002 .0002 0° 20'

5-44 UNF .1102 .1134 .1126 .0002 .0002 0° 20'

6-32 UNC .1177 .1214 .1204 .0003 .0003 0° 15'

6-40 UNF .1218 .1252 .1243 .0002 .0002 0° 20'

8-32 UNC .1437 .1475 .1465 .0003 .0003 0° 15'

8-36 UNF .1460 .1496 .1487 .0002 .0002 0° 20'

10-24 UNC .1629 .1672 .1661 .0003 .0003 0° 15'

10-32 UNF .1697 .1736 .1726 .0003 .0003 0° 15'

12-24 UNC .1889 .1933 .1922 .0003 .0003 0° 15'

12-28 UNF .1928 .1970 .1959 .0003 .0003 0° 15'

12-32 UNEF .1957 .1998 .1988 .0003 .0003 0° 15'

1/4-20 UNC .2175 .2224 .2211 .0003 .0003 0° 15'

1/4-28 UNF .2268 .2311 .2300 .0003 .0003 0° 15'

1/4-32 UNEF .2297 .2339 .2328 .0003 .0003 0° 15'

5/16-18 UNC .2764 .2817 .2803 .0003 .0003 0° 10'

5/16-24 UNF .2854 .2902 .2890 .0003 .0003 0° 15'

5/16-32 UNEF .2922 .2964 .2953 .0003 .0003 0° 15'

3/8-16 UNC .3344 .3401 .3387 .0003 .0003 0° 10'

3/8-24 UNF .3479 .3528 .3516 .0003 .0003 0° 15'

3/8-32 UNEF .3547 .3591 .3580 .0003 .0003 0° 15'

7/16-14 UNC .3911 .3972 .3957 .0003 .0003 0° 10'

7/16-20 UNF .4050 .4104 ..4091 .0003 .0003 0° 15'

7/16-28 UNEF .4143 .4189 .4178 .0003 .0003 0° 15'

1/2-13 UNC .4500 .4565 .4548 .0003 .0003 0° 10'

1/2-20 UNF .4675 .4731 .4717 .0003 .0003 0° 15'

1/2-28 UNEF .4768 .4816 .4804 .0003 .0003 0° 15'

9/16-12 UNC .5084 .5152 .5135 .0003 .0003 0° 10'

9/16-18 UNF .5264 .5323 .5308 .0003 .0003 0° 10'

9/16-24 UNEF .5354 .5405 .5392 .0003 .0003 0° 15'

5/8-11 UNC .5660 .5732 .5714 .0003 .0003 0° 10'

5/8-18 UNF .5889 .5949 .5934 .0003 .0003 0° 10'

5/8-24 UNEF .5979 .6031 .6018 .0003 .0003 0° 15'

11/16-24 UNEF .6604 .6656 .6643 .0003 .0003 0° 15'

3/4-10 UNC .6850 .6927 .6907 .0003 .0003 0° 10'

3/4-16 UNF .7094 .7159 .7143 .0003 .0003 0° 10'

3/4-20 UNEF .7175 .7232 .7218 .0003 .0003 0° 15'

13/16-20 UNEF .7800 .7857 .7843 .0003 .0003 0° 15'

7/8-9 UNC .8028 .8110 .8089 .0003 .0003 0° 10'

7/8-14 UNF .8286 .8356 .8339 .0003 .0003 0° 10'

7/8-20 UNEF .8425 .8482 .8468 .0003 .0003 0° 15'

15/16-20 UNEF .9050 .9109 .9094 .0003 .0003 0° 15'

1-8 UNC .9188 .9276 .9254 .0004 .0004 0° 05'

1-12 UNF .9459 .9535 .9516 .0003 .0003 0° 10'

1-14 UNS .9536 .9609 .9590 .0003 .0003 0° 10'

1-20 UNEF .9675 .9734 .9719 .0003 .0003 0° 15'

1 1/16-18 UNEF 1.0315 1.0264 1.0310 .0003 .0003 0° 10'

1 1/8-7 UNC 1.0322 1.0416 1.0393 .0004 .0004 0° 05'

1 1/8-12 UNF 1.0709 1.0787 1.0768 .0003 .0003 0° 10'

1 1/8-18 UNEF 1.0889 1.0951 1.0935 .0003 .0003 0° 10'

1 3/16-18 UNEF 1.1514 1.1577 1.1561 .0003 .0003 0° 10'

1 1/4-7 UNC 1.1572 1.1668 1.1644 .0004 .0004 0° 05'

1 1/4-12 UNF 1.1959 1.2039 1.2019 .0003 .0003 0° 10'

1 1/4-18 UNEF 1.2139 1.2202 1.2186 .0003 .0003 0° 10'

1 5/16-18 UNEF 1.2764 1.2827 1.2811 .0003 .0003 0° 10'

1 3/8-6 UNC 1.2667 1.2771 1.2745 .0004 .0004 0° 05'

1 3/8-12 UNF 1.3209 1.3291 1.3270 .0003 .0003 0° 10'

1 3/8-18 UNEF 1.3389 1.3452 1.3436 .0003 .0003 0° 10'

1 7/16-18 UNEF 1.4014 1.4079 1.4062 .0003 .0003 0° 10'

1 1/2-6 UNC 1.3917 1.4022 1.3996 .0004 .0004 0° 05'

1 1/2-12 UNF 1.4459 1.4542 1.4522 .0003 .0003 0° 10'

1 1/2-18 UNEF 1.4639 1.4704 1.4687 .0003 .0003 0° 10'

RING GAGES & SET PLUGS METRIC THREAD PLUG GAGES

PITCH DIAMETERS PITCH DIAMETERS

GO NO GO SIZE GO NO GO

4G & 6G 4G 6G<