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Brown & Sharpe Mfg. Co.
TABLE OF TOOTH PARTS—Continued
CIRCULAR PITCH IN FIRST COLUMN
| Circular Pitch | Threads or Teeth per inch. Linear. | Diametral Pitch | Thickness of Tooth on Pitch Line. | Addendum and Module | Working Depth of Tooth. | Depth of Space below Pitch Line. | Whole Depth of Tooth. | Width of Thread-Tool at End. | Width of Thread at Top. |
|---|---|---|---|---|---|---|---|---|---|
| P′ | 1″/P′ | P | t | s | D″ | s+f | D″+f | P′×.3005 | P′×.3354 |
| 1/2 | 2 | 6.2832 | .2500 | .1592 | .3183 | .1842 | .3433 | .1547 | .1677 |
| 4/9 | 2+1/4 | 7.0685 | .2222 | .1415 | .2830 | .1637 | .3052 | .1376 | .1490 |
| 7/16 | 2/27 | 7.1808 | .2187 | .1393 | .2785 | .1611 | .3003 | .1354 | .1467 |
| 3/7 | 2+1/3 | 7.3304 | .2143 | .1364 | .2728 | .1578 | .2942 | .1326 | .1437 |
| 2/5 | 2+1/2 | 7.8540 | .2000 | .1273 | .2546 | .1473 | .2746 | .1238 | .1341 |
| 3/8 | 2+2/3 | 8.3776 | .1875 | .1194 | .2387 | .1381 | .2575 | .1161 | .1258 |
| 4/11 | 2+3/4 | 8.6394 | .1818 | .1158 | .2316 | .1340 | .2498 | .1125 | .1219 |
| 1/8 | 3 | 9.4248 | .1666 | .1061 | .2122 | .1228 | .2289 | .1032 | .1118 |
| 5/16 | 3+1/5 | 10.0531 | .1562 | .0995 | .1989 | .1151 | .2146 | .0967 | .1048 |
| 3/10 | 3+1/3 | 10.4719 | .1500 | .0955 | .1910 | .1105 | .2060 | .0928 | .1006 |
| 2/7 | 3+1/2 | 10.9956 | .1429 | .0909 | .1819 | .1052 | .1962 | .0884 | .0958 |
| 1/4 | 4 | 12.5664 | .1250 | .0796 | .1591 | .0921 | .1716 | .0774 | .0838 |
| 2/9 | 4+1/2 | 14.1372 | .1111 | .0707 | .1415 | .0818 | .1526 | .0688 | .0745 |
| 1/5 | 5 | 15.7080 | .1000 | .0637 | .1273 | .0737 | .1373 | .0619 | .0671 |
| 3/16 | 5+1/3 | 16.7552 | .0937 | .0597 | .1194 | .0690 | .1287 | .0580 | .0629 |
| 2/11 | 5+1/2 | 17.2788 | .0909 | .0579 | .1158 | .0670 | .1249 | .0563 | .0610 |
| 1/6 | 6 | 18.8496 | .0833 | .0531 | .1061 | .0614 | .1144 | .0516 | .0559 |
| 2/13 | 6+1/2 | 20.4203 | .0769 | .0489 | .0978 | .0566 | .1055 | .0476 | .0516 |
| 1/7 | 7 | 21.9911 | .0714 | .0455 | .0910 | .0526 | .0981 | .0442 | .0479 |
| 2/15 | 7+1/2 | 23.5619 | .0666 | .0425 | .0850 | .0492 | .0917 | .0413 | .0447 |
| 1/8 | 8 | 25.1327 | .0625 | .0398 | .0796 | .0460 | .0858 | .0387 | .0419 |
| 1/9 | 9 | 28.2743 | .0555 | .0354 | .0707 | .0409 | .0763 | .0344 | .0373 |
| 1/10 | 10 | 31.4159 | .0500 | .0318 | .0637 | .0368 | .0687 | .0309 | .0335 |
| 1/16 | 16 | 50.2655 | .0312 | .0199 | .0398 | .0230 | .0429 | .0193 | .0210 |
| 1/20 | 20 | 62.8318 | .0250 | .0159 | .0318 | .0184 | .0343 | .0155 | .0168 |
