31 六角头不脱出螺钉GB/T 838—1988标准
六角头不脱出螺钉GB838—1988标准
六角头不脱出螺钉尺寸规格、质量见表4.2-72、表4.2-73。
表4.2-72 六角头不脱出螺钉的尺寸规格（mm)
| 螺纹规格d (6g) | M5 | M6 | M8 | M10 | M12 | (M14) | M16 |
| d1 max | 3.5 | 4.5 | 5.5 | 7 | 9 | 11 | 12 |
| s max | 8 | 10 | 13 | 16 | 18 | 21 | 24 |
| K 公称 | 3.5 | 4 | 5.3 | 6.4 | 7.5 | 8.8 | 10 |
| b | 8 | 10 | 12 | 15 | 18 | 20 | 24 |
| C | 1.6 | 2 | 2.5 | 3 | 4 | 5 | 6 |
| e min | 8.79 | 11.05 | 14.38 | 17.77 | 20.03 | 23.35 | 26.75 |
| l① 通用规格范围 | 14-40 | 20-50 | 25-65 | 30-80 | 30-100 | 35-100 | 40-100 |
①公称长度系列为：14、16、20〜80(5进级）、90、100 mm。
表4.2-73 六角头不脱出螺钉的质量（kg)
每1000件钢制品的大约质量
| l | G | l | G | l | G | l | G | l | G | l | G | l | G |
| M5 | M6 | M8 | M10 | M12 | (M14) | M16 | |||||||
| (14) | 2.74 | 20 | 5.33 | 25 | 11.54 | 30 | 21.83 | 30 | 33.74 | 35 | 54.39 | 40 | 81.14 |
| 16 | 2.87 | 25 | 5.9 | 30 | 12.41 | 35 | 23.24 | 35 | 36.1 | 40 | 57.91 | 45 | 85.36 |
| 20 | 3.14 | 30 | 6.48 | 35 | 13.27 | 40 | 24.65 | 40 | 38.46 | 45 | 61.44 | 50 | 89.57 |
| 25 | 3.48 | 35 | 7.05 | 40 | 14.14 | 45 | 26.05 | 45 | 40.82 | 50 | 64.97 | (55) | 93.79 |
| 30 | 3.82 | 40 | 7.62 | 45 | 15.01 | 50 | 27.46 | 50 | 43.18 | (55) | 68.49 | 60 | 98 |
| 35 | 4.15 | 45 | 8.19 | 50 | 15.87 | (55) | 28.87 | (55) | 45.54 | 60 | 72.02 | (65) | 102.2 |
| 40 | 4.49 | 50 | 8.76 | (55) | 16.74 | 60 | 30.28 | 60 | 47.9 | 65 | 75.55 | 70 | 106.4 |
| 60 | 17.61 | (65) | 31.69 | (65) | 50.26 | 70 | 79.07 | 75 | 110.7 | ||||
| (65) | 18.47 | 70 | 33.09 | 70 | 52.63 | 75 | 82.6 | 80 | 114.9 | ||||
| 75 | 34.5 | 75 | 54.99 | 80 | 86.12 | 90 | 123.3 | ||||||
| 80 | 35.91 | 80 | 57.35 | 90 | 93.18 | 100 | 131.7 | ||||||
| 90 | 62.07 | 100 | 100.2 | ||||||||||
| 100 | 66.79 | ||||||||||||
注：表列规格为通用规格。尽可能不采用括号内的规格。