Применялись ранее для механических оптических приборов
| Наружный диаметр, мм | Диаметр сверления, мм | Шаг, мм | Витков на 25 мм |
|---|---|---|---|
| 3,000 | 2,107 | 0,625 | 40 |
| 3,500 | 2,607 | 0,625 | 40 |
| 4,000 | 2,978 | 0,715 | 35 |
| 4,500 | 3,478 | 0,715 | 35 |
| 5,000 | 3,808 | 0,834 | 30 |
| 5,500 | 4,308 | 0,834 | 30 |
| 6,000 | 4,808 | 0,834 | 30 |
| 7,000 | 5,570 | 1,000 | 25 |
| 8,000 | 6,670 | 1,000 | 25 |
| 9,000 | 7,213 | 1,250 | 20 |
| 10,000 | 8,213 | 1,250 | 20 |
| 11,000 | 9,213 | 1,250 | 20 |
| 12,000 | 9,897 | 1,471 | 17 |
| 13,000 | 10,897 | 1,471 | 17 |
| 14,000 | 11,535 | 1,724 | 14,5 |
| 15,000 | 12,535 | 1,724 | 14,5 |
| 16,000 | 13,141 | 2,000 | 12,5 |
| 18,000 | 15,141 | 2,000 | 12,5 |
| 20,000 | 16,426 | 2,500 | 10 |
| 22,000 | 18,426 | 2,500 | 10 |
| 24,000 | 20,026 | 2,780 | 9 |
| 26,000 | 22,026 | 2,780 | 9 |
| 28,000 | 23,532 | 3,125 | 8 |
| 30,000 | 25,532 | 3,125 | 8 |
| 32,000 | 26,895 | 3,571 | 7 |
| 34,000 | 28,895 | 3,571 | 7 |
| 38,000 | 32,043 | 4,167 | 6 |
| 42,000 | 36,043 | 4,167 | 6 |
| 46,000 | 38,852 | 5,000 | 5 |
| 50,000 | 42,852 | 5,000 | 5 |
