Болты с полукруглой головкой и усом
ГОСТ 7801 – 81
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Болты с увеличенной полукруглой головкой и усом класса точности С |
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| d | D | k | R≈ | W | b | |
| l ≤ 120 | l > 120 | |||||
| 6 | 14 | 3 | 11 | 3 | 18 | – |
| 8 | 18 | 4 | 14 | 3,5 | 22 | – |
| 10 | 23 | 5 | 18 | 5 | 26 | 32 |
| 12 | 28 | 6 | 22 | 6 | 30 | 36 |
| 16 | 35 | 8 | 26 | 8 | 38 | 44 |
| 20 | 44 | 10 | 32 | 9 | 46 | 52 |
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| Стандартные длины | ||||||
|---|---|---|---|---|---|---|
| l | Номинальный диаметр резьбы d | |||||
| 6 | 8 | 10 | 12 | 16 | 20 | |
| 25 | × | – | – | – | – | – |
| 30 | × | × | – | – | – | – |
| 35 | × | × | × | – | – | – |
| 40 | × | × | × | × | × | – |
| 45 | × | × | × | × | × | – |
| 50 | × | × | × | × | × | – |
| 55 | × | × | × | × | × | × |
| 60 | × | × | × | × | × | × |
| 65 | × | × | × | × | × | × |
| 70 | × | × | × | × | × | × |
| 75 | × | × | × | × | × | × |
| 80 | × | × | × | × | × | × |
| 90 | × | × | × | × | × | × |
| 100 | × | × | × | × | × | × |
| 110 | – | × | × | × | × | × |
| 120 | – | × | × | × | × | × |
| 130 | – | × | × | × | × | × |
| 140 | – | × | × | × | × | × |
| 150 | – | × | × | × | × | × |
| 160 | – | – | × | × | × | × |
| 170 | – | – | × | × | × | × |
| 180 | – | – | × | × | × | × |
| 190 | – | – | × | × | × | × |
| 200 | – | – | × | × | × | × |
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