2 C级六角螺母GB/T 41—2000标准
C级六角螺母GB41—2000标准
C级六角螺母的尺寸规格见表4.3-2。
表4.3-2 C级六角螺母的尺寸规格（mm)
用途：
与螺栓、螺柱、螺钉配合使用，起联接紧固作用。C级螺母用于表面比较粗糙、对精度要求不高的机器、设备或结构上。
(1)优选的螺纹规格
| 螺纹规格 D | M5 | M6 | M8 | M10 | M12 | M16 | M20 | M24 | M30 | M36 | M42 | M48 | M56 | M64 | |
| p① | 0.8 | 1 | 1.25 | 1.5 | 1.75 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | |
| dw min | 6.7 | 8.7 | 11.5 | 14.5 | 16.5 | 22 | 27.7 | 33.3 | 42.8 | 51.1 | 60 | 69.5 | 78.7 | 88.2 | |
| e min | 8.63 | 10.89 | 14.2 | 17.59 | 19.85 | 26.17 | 32.95 | 39.55 | 50.85 | 60.79 | 71.3 | 82.6 | 93.56 | 104.86 | |
| m | max | 5.6 | 6.4 | 7.9 | 9.5 | 12.2 | 15.9 | 19 | 22.3 | 26.4 | 31.9 | 34.9 | 38.9 | 45.9 | 52.4 |
| min | 4.4 | 4.9 | 6.4 | 8 | 10.4 | 14.1 | 16.9 | 20.2 | 24.3 | 29.4 | 32.4 | 36.4 | 43.4 | 49.4 | |
| mw min | 3.5 | 3.7 | 5.1 | 6.4 | 8.3 | 11.3 | 13.5 | 16.2 | 19.4 | 23.2 | 25.9 | 29.1 | 34.7 | 39.5 | |
| S | 公称=max | 8 | 10 | 13 | 16 | 18 | 24 | 30 | 36 | 46 | 55 | 65 | 75 | 85 | 95 |
| min | 7.64 | 9.64 | 12.57 | 15.57 | 17.57 | 23.16 | 29.16 | 35 | 45 | 53.8 | 63.1 | 73.1 | 82.8 | 92.8 | |
(2)非优选的螺纹规格
| 螺纹规格 D | M14 | M18 | M22 | M27 | M33 | M39 | M45 | M52 | M60 | |
| p① | 2 | 2.5 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | |
| dw min | 19.2 | 24.9 | 31.4 | 38 | 46.6 | 55.9 | 64.7 | 74.2 | 83.4 | |
| e min | 22.78 | 29.56 | 37.29 | 45.2 | 55.37 | 66.44 | 76.95 | 88.25 | 99.21 | |
| m | max | 13.9 | 16.9 | 20.2 | 24.7 | 29.5 | 34.3 | 36.9 | 42.9 | 48.9 |
| min | 12.1 | 15.1 | 18.1 | 22.6 | 27.4 | 31.8 | 34.4 | 40.4 | 46.4 | |
| mw min | 9.7 | 12.1 | 14.5 | 18.1 | 21.9 | 25.4 | 27.5 | 32.2 | 37.1 | |
| S | 公称=max | 21 | 27 | 34 | 41 | 50 | 60 | 70 | 80 | 90 |
| min | 20.16 | 26.16 | 33 | 40 | 49 | 58.8 | 68.1 | 78.1 | 87.8 | |
①P—螺距。