ГОСТ 20866-81 - Стальные стойки установочные крепежные круглые с лысками и резьбовыми отверстиями
Таблица 1
| d | Шаг резьбы P | Размер под ключ S | D | d1 | l | l1 | l2 | |
| норм. | пред.откл. | |||||||
| 2 | 0.40 | 4.0 | -0.16 | 5 | 2.2 | 4 | 5 | 5 |
| 2.5 | 0.45 | 5.0 | -0.16 | 6 | 2.7 | 5 | 6 | 5 |
| 3 | 0.50 | 5.5 | -0.16 | 7 | 3.2 | 6 | 9 | 5 |
| 4 | 0.70 | 7.0 | -0.20 | 8 | 4.3 | 7 | 10 | 6 |
| 5 | 0.80 | 8.0 | -0.20 | 9 | 5.3 | 8 | 12 | 8 |
| 6 | 1.00 | 10.0 | -0.20 | 11 | 6.4 | 9 | 13 | 10 |
| 8 | 1.25 | 13.0 | -0.24 | 15 | 8.4 | 12 | 16 | 12 |
Таблица 2
| d | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 22 | 24 | 26 | 28 | 30 | 32 | 34 | 36 | 38 | 40 |
| 2 | 0.5 | 1.0 | 1.5 | 2.0 | 2.5 | 3.0 | 3.5 | 4.0 | 4.5 | 5.0 | 5.5 | 6.0 | 6.5 | 7.0 | 7.5 | 8.5 | 9.5 | 10.5 | 11.5 | 12.5 | |||||
| 2.5 | 0.6 | 1.0 | 1.5 | 2.0 | 2.5 | 3.0 | 3.5 | 4.0 | 4.5 | 5.0 | 5.5 | 6.0 | 6.5 | 7.0 | 7.5 | 8.5 | 9.5 | 10.5 | 11.5 | 12.5 | 13.5 | 14.5 | 15.5 | 16.5 | 17.5 |
| 3 | 2.5 | 3.0 | 3.5 | 4.0 | 4.5 | 5.0 | 5.5 | 6.0 | 6.5 | 7.0 | 7.5 | 8.5 | 9.5 | 10.5 | 11.5 | 12.5 | 13.5 | 14.5 | 15.5 | 16.5 | 17.5 | ||||
| 4 | 2.0 | 2.5 | 3.0 | 3.5 | 4.0 | 4.5 | 5.0 | 5.5 | 6.0 | 6.5 | 7.0 | 8.0 | 9.0 | 10.0 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 16.0 | 17.0 | ||||
| 5 | 11.0 | 12.0 | 13.0 | 14.0 | 15.0 | 16.0 | |||||||||||||||||||
| 6 | 15.0 | ||||||||||||||||||||||||
| 8 |
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