27 加强半圆头方颈螺栓GB/T 794—1993标准
加强半圆头方颈螺栓GB794—1993标准
加强半圆头方颈螺栓的尺寸规格见表4.1-51。
表4.1-51 加强半圆头方颈螺栓的尺寸规格（mm)
| 螺纹规格d | M6 | M8 | M10 | M12 | (M14) | M16 | M20 | |
| b | l≤125 | 18 | 22 | 26 | 30 | 34 | 38 | 46 |
| 125<l≤200 | — | 28 | 32 | 36 | 40 | 44 | 52 | |
| dk | max | 15.1 | 19.1 | 24.3 | 29.3 | 33.6 | 36.6 | 45.6 |
| min | 13.3 | 17.3 | 22.16 | 27.16 | 31.16 | 34 | 43 | |
| d1 | 10 | 13.5 | 16.5 | 20 | 23 | 26 | 32 | |
| k | max | 3.98 | 4.98 | 6.28 | 7.48 | 8.9 | 9.9 | 13.9 |
| min | 3.2 | 4.1 | 5.4 | 6.6 | 7.55 | 8.55 | 10.55 | |
| k1 | max | 4.4 | 5.4 | 6.4 | 8.45 | 9.45 | 10.45 | 12.55 |
| min | 3.6 | 4.6 | 5.6 | 7.55 | 8.55 | 9.55 | 11.45 | |
| R | 14 | 18 | 24 | 26 | 30 | 34 | 40 | |
| R | 4.5 | 5 | 7 | 9 | 10 | 10.5 | 14 | |
| r min | 0.25 | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 0.8 | |
| r1 ≈ | 0.3 | 0.3 | 0.3 | 0.5 | 0.5 | 0.5 | 0.5 | |
| Ss | max | 6.3 | 8.36 | 10.36 | 12.43 | 14.43 | 16.43 | 20.52 |
| min | 5.84 | 7.8 | 9.8 | 11.76 | 13.76 | 15.76 | 19.72 | |
| t | 0.3 | 0.3 | 0.3 | 0.5 | 0.5 | 0.5 | 0.5 | |
| x max | 2.5 | 3.2 | 3.8 | 4.2 | 5 | 5 | 6.3 | |
| l (商品规格） | 20~60 | 25~80 | 40~100 | 45〜120 | 50~140 | 55〜160 | 65~200 | |
| l系列 | 20,25,30,35,40,45,50,(55),60,(65),70,(75), 80,(85)，90,（95), 100,110,120,130,140,150,160,(170)，180,190,200 | |||||||
注：尽量不采用带括号的规格。