Standard Pitch Diameter Chart
Thread Plug Gages
| BASIC THREAD DESIGNATION |
DIMENSIONS IN MILLIMETERS |
DIMENSIONS IN INCHES |
| NOMINAL O.D. |
PITCH |
MAJOR DIA. |
PITCH DIA. |
MINOR DIA. |
NOMINAL O.D. |
THREADS PER INCH |
MAJOR DIA. |
PITCH DIA. |
MINOR DIA. |
| MIN. (MUST CLEAR) |
MIN. GO |
MAX. HI |
MIN. |
MAX. |
MIN. (MUST CLEAR) |
MIN. GO |
MAX. HI |
MIN. |
MAX. |
| M1.6x0.35 |
1.6 |
0.35 |
1.600 |
1.373 |
1.458 |
1.221 |
1.321 |
.06299 |
72.57 |
.06299 |
.05406 |
.05740 |
.04807 |
.05201 |
| M2x0.4 |
2.0 |
0.40 |
2.000 |
1.740 |
1.830 |
1.567 |
1.679 |
.07874 |
63.50 |
.07874 |
.06850 |
.07205 |
.06169 |
.06610 |
| M2.5x0.45 |
2.5 |
0.45 |
2.500 |
2.208 |
2.303 |
2.013 |
2.138 |
.09843 |
56.44 |
.09843 |
.08693 |
.09067 |
.07925 |
.08417 |
| M3x0.5 |
3.0 |
0.50 |
3.000 |
2.675 |
2.775 |
2.459 |
2.599 |
.11811 |
50.80 |
.11811 |
.10531 |
.10925 |
.09681 |
.10232 |
| M3.5x0.6 |
3.5 |
0.60 |
3.500 |
3.110 |
3.222 |
2.850 |
3.010 |
.13780 |
42.33 |
.13780 |
.12244 |
.12685 |
.11220 |
.11850 |
| M4x0.7 |
4.0 |
0.70 |
4.000 |
3.545 |
3.663 |
3.242 |
3.422 |
.15748 |
36.29 |
.15748 |
.13957 |
.14421 |
.12764 |
.13472 |
| M5x0.8 |
5.0 |
0.80 |
5.000 |
4.480 |
4.605 |
4.134 |
4.334 |
.19685 |
31.75 |
.19685 |
.17638 |
.18130 |
.16276 |
.17063 |
| M6x1 |
6.0 |
1.00 |
6.000 |
5.350 |
5.500 |
4.917 |
5.153 |
.23622 |
25.40 |
.23622 |
.21063 |
.21654 |
.19358 |
.20287 |
| M8x1.25 |
8.0 |
1.25 |
8.000 |
7.188 |
7.348 |
6.647 |
6.912 |
.31496 |
20.32 |
.31496 |
.28299 |
.28929 |
.26169 |
.27213 |
| M8x1 |
8.0 |
1.00 |
8.000 |
7.350 |
7.500 |
6.917 |
7.153 |
.31496 |
25.40 |
.31496 |
.28937 |
.29528 |
.27232 |
.28161 |
| M10x1.5 |
10.0 |
1.50 |
10.000 |
9.026 |
9.206 |
8.376 |
8.676 |
.39370 |
16.93 |
.39370 |
.35535 |
.36244 |
.32976 |
.34157 |
| M10x1.25 |
10.0 |
1.25 |
10.000 |
9.188 |
9.348 |
8.647 |
8.912 |
.39370 |
20.32 |
.39370 |
.36173 |
.36803 |
.34043 |
.35087 |
| M10x0.75 |
10.0 |
0.75 |
10.000 |
9.513 |
9.645 |
9.188 |
9.378 |
.39370 |
33.87 |
.39370 |
.37453 |
.37972 |
.36173 |
.36921 |
| M12x1.75 |
12.0 |
1.75 |
12.000 |
10.863 |
11.063 |
10.106 |
10.441 |
.47244 |
14.51 |
.47244 |
.42768 |
.43555 |
.39787 |
.41106 |
| M12x1.5 |
12.0 |
1.50 |
12.000 |
11.026 |
11.216 |
10.376 |
10.676 |
.47244 |
16.93 |
.47244 |
.43409 |
.44157 |
.40850 |
.42031 |
| M12x1.25 |
12.0 |
1.25 |
12.000 |
11.188 |
11.368 |
10.647 |
10.912 |
.47244 |
20.32 |
.47244 |
.44047 |
.44756 |
.41917 |
.42961 |
| M12x1 |
12.0 |
1.00 |
12.000 |
11.350 |
11.510 |
10.917 |
11.153 |
.47244 |
25.40 |
.47244 |
.44685 |
.45315 |
.42980 |
.43909 |
| M14x2 |
14.0 |
2.00 |
14.000 |
12.701 |
12.913 |
11.835 |
12.210 |
.55118 |
12.70 |
.55118 |
.50004 |
.50839 |
.46594 |
.48071 |
| M14x1.5 |
14.0 |
1.50 |
14.000 |
13.026 |
13.216 |
12.376 |
12.676 |
.55118 |
16.93 |
.55118 |
.51283 |
.52031 |
.48724 |
.49906 |
| M15x1 |
15.0 |
1.00 |
15.000 |
14.350 |
14.510 |
13.917 |
14.153 |
.59055 |
25.40 |
.59055 |
.56496 |
.57126 |
.54791 |
.55720 |
| M16x2 |
16.0 |
2.00 |
16.000 |
14.701 |
14.913 |
13.835 |
14.210 |
.62992 |
12.70 |
.62992 |
.57878 |
.58713 |
.54469 |
.55945 |
| M16x1.5 |
16.0 |
1.50 |
16.000 |
15.026 |
15.216 |
14.376 |
14.676 |
.62992 |
16.93 |
.62992 |
.59157 |
.59906 |
.56598 |
.57780 |
| M17x1 |
17.0 |
1.00 |
17.000 |
16.350 |
16.510 |
15.917 |
16.153 |
.66929 |
25.40 |
.66929 |
.64370 |
.65000 |
.61886 |
.63594 |
| M18x1.5 |
18.0 |
1.50 |
18.000 |
17.026 |
17.216 |
16.376 |
16.676 |
.70866 |
16.93 |
.70866 |
.67031 |
.67780 |
.64472 |
.65654 |
| M20x2.5 |
20.0 |
2.50 |
20.000 |
18.376 |
18.600 |
17.294 |
17.744 |
.78740 |
10.16 |
.78740 |
.72346 |
.73228 |
.68087 |
.69858 |
| M20x1.5 |
20.0 |
1.50 |
20.000 |
19.026 |
19.216 |
18.376 |
18.676 |
.78740 |
16.93 |
.78740 |
.74906 |
.75654 |
.72346 |
.73528 |
| M20x1 |
20.0 |
1.00 |
20.000 |
19.350 |
19.510 |
18.917 |
19.153 |
.78740 |
25.40 |
.78740 |
.76181 |
.76811 |
.74476 |
.75406 |
| M22x2.5 |
22.0 |
2.50 |
22.000 |
20.376 |
20.600 |
19.294 |
19.744 |
.86614 |
10.16 |
.86614 |
.80220 |
.81102 |
.75961 |
.77732 |
| M22x1.5 |
22.0 |
1.50 |
22.000 |
21.026 |
21.216 |
20.376 |
20.676 |
.86614 |
16.93 |
.86614 |
.82780 |
.83528 |
.80220 |
.81402 |
| M24x3 |
24.0 |
3.00 |
24.000 |
22.051 |
22.316 |
20.752 |
21.252 |
.94488 |
8.47 |
.94488 |
.86815 |
.87858 |
.81701 |
.83669 |
| M24x2 |
24.0 |
2.00 |
24.000 |
22.701 |
22.925 |
21.835 |
22.210 |
.94488 |
12.70 |
.94488 |
.89374 |
.90256 |
.85965 |
.87441 |
| M25x1.5 |
25.0 |
1.50 |
25.000 |
24.026 |
24.226 |
23.376 |
23.676 |
.98425 |
16.93 |
.98425 |
.94591 |
.95378 |
.92031 |
.93213 |
| M27x3 |
27.0 |
3.00 |
27.000 |
25.051 |
25.316 |
23.752 |
24.252 |
1.06299 |
8.47 |
1.06299 |
.98626 |
.99669 |
.93512 |
.95480 |
| M27x2 |
27.0 |
2.00 |
27.000 |
25.701 |
25.925 |
24.835 |
25.210 |
1.06299 |
12.70 |
1.06299 |
1.01185 |
1.02067 |
.97776 |
.99252 |
| M30x3.5 |
30.0 |
3.50 |
30.000 |
27.727 |
28.007 |
26.211 |
26.771 |
1.18110 |
7.26 |
1.18110 |
1.09161 |
1.10264 |
1.03193 |
1.05398 |
| M30x2 |
30.0 |
2.00 |
30.000 |
28.701 |
28.925 |
27.835 |
28.210 |
1.18110 |
12.70 |
1.18110 |
1.12996 |
1.13878 |
1.09587 |
1.11063 |
| M30x1.5 |
30.0 |
1.50 |
30.000 |
29.026 |
29.226 |
28.376 |
28.676 |
1.18110 |
16.93 |
1.18110 |
1.14276 |
1.15063 |
1.11717 |
1.12898 |
| M33x2 |
33.0 |
2.00 |
33.000 |
31.701 |
31.925 |
30.835 |
31.210 |
1.29921 |
12.70 |
1.29921 |
1.24807 |
1.25689 |
1.21398 |
1.22874 |
| M35x1.5 |
35.0 |
1.50 |
35.000 |
34.026 |
34.226 |
33.376 |
33.676 |
1.37795 |
16.93 |
1.37795 |
1.33961 |
1.34748 |
1.31402 |
1.32559 |
| M36x4 |
36.0 |
4.00 |
36.000 |
33.402 |
33.702 |
31.670 |
32.270 |
1.41732 |
6.35 |
1.41732 |
1.31504 |
1.32685 |
1.24685 |
1.27047 |
| M36x2 |
36.0 |
2.00 |
36.000 |
34.701 |
34.925 |
33.835 |
34.210 |
1.41732 |
12.70 |
1.41732 |
1.36618 |
1.37500 |
1.33209 |
1.34685 |
| M39x2 |
39.0 |
2.00 |
39.000 |
37.701 |
37.925 |
36.835 |
37.210 |
1.53543 |
12.70 |
1.53543 |
1.48429 |
1.49311 |
1.45020 |
1.46496 |
