| 0.75 inch OD on 1 inch Triangular pitch | |||||
| Shell Dia (inch) | 1 pass | 2 pass | 4 pass | 6 pass | 8 pass |
| 8 | 32 | 26 | 20 | 20 | 0 |
| 10 | 52 | 52 | 40 | 36 | 0 |
| 12 | 81 | 76 | 68 | 68 | 60 |
| 13.25 | 97 | 90 | 82 | 76 | 70 |
| 15.25 | 137 | 124 | 116 | 108 | 108 |
| 17.25 | 177 | 166 | 158 | 150 | 142 |
| 19.25 | 224 | 220 | 204 | 192 | 188 |
| 21.25 | 277 | 270 | 246 | 240 | 234 |
| 23.25 | 341 | 324 | 308 | 302 | 292 |
| 25 | 413 | 394 | 370 | 356 | 346 |
| 27 | 481 | 460 | 432 | 420 | 408 |
| 29 | 553 | 526 | 480 | 468 | 456 |
| 31 | 657 | 640 | 600 | 580 | 560 |
| 33 | 749 | 718 | 688 | 676 | 648 |
| 35 | 845 | 824 | 780 | 766 | 748 |
| 37 | 934 | 914 | 886 | 866 | 838 |
| 39 | 1049 | 1024 | 982 | 968 | 948 |
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