5 粗牙和细牙六角薄螺母GB/T 6172.1、GB/T 6173—2000标准
粗牙和细牙六角薄螺母GB6172.1、GB6173—2000标准
粗牙和细牙六角薄螺母的尺寸规格见表4.3-5。
表4.3-5 粗牙和细牙六角薄螺母的尺寸规格（mm)
用途：
六角薄螺母的厚度m较薄，多用于被联接机件的表面空间受限制的场合，也常用做防止主螺母回松的锁紧螺母。
| 螺纹规格（6H） | D | Ml.6 | M2 | M2.5 | M3 | M4 | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | (M18) | M20 |
| DxP | — | — | — | — | — | — | — | M8x1 | M10x1 | M12x1.5 | (M14x1.5) | M16x1.5 | (M18x1.5) | M20x2 | |
| — | — | — | — | — | — | — | — | M10x1.25 | M12x1.25 | — | — | — | M20x1.5 | ||
| da | max | 1.84 | 2.3 | 2.9 | 3.45 | 4.6 | 5.75 | 6.75 | 8.75 | 10.8 | 13 | 15.1 | 17.3 | 19.5 | 21.6 |
| min | 1.6 | 2 | 2.5 | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | |
| dw | min | 2.4 | 3.1 | 4.1 | 4.6 | 5.9 | 6.9 | 8.9 | 11.6 | 14.6 | 16.6 | 19.6 | 22.5 | 24.8 | 27.7 |
| e | min | 3.41 | 4.32 | 5.45 | 6.01 | 7.66 | 8.79 | 11.05 | 14.38 | 17.77 | 20.03 | 23.35 | 26.75 | 29.56 | 32.95 |
| s | max | 3.2 | 4 | 5 | 5.5 | 7 | 8 | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 |
| min | 3.02 | 3.82 | 4.82 | 5.32 | 6.78 | 7.78 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 26.16 | 29.16 | |
| m | max | 1 | 1.2 | 1.6 | 1.8 | 2.2 | 2.7 | 3.2 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
续表4.3-5：
| 螺纹规格（6H） | D | (M22) | M24 | (M27) | M30 | (M33) | M36 | (M39) | M42 | (M45) | M48 | (M52) | M56 | (M60) | M64 |
| DxP | (M22x1.5) | M24x2 | (M27x2) | M30x2 | (M33x2) | M36x3 | (M39x3) | M42x3 | (M45x3) | M48x3 | (M52x4) | M56x4 | (M60x4) | M64x4 | |
| — | — | — | — | — | — | — | — | — | — | — | — | — | — | ||
| da | max | 23.7 | 25.9 | 29.1 | 32.4 | 35.6 | 38.9 | 42.1 | 45.4 | 48.6 | 51.8 | 56.2 | 6.05 | 64.8 | 69.1 |
| min | 22 | 24 | 27 | 30 | 33 | 36 | 39 | 42 | 45 | 48 | 52 | 56 | 60 | 64 | |
| dw | min | 31.4 | 33.2 | 38 | 42.7 | 46.6 | 51.1 | 55.9 | 60.6 | 64.7 | 69.4 | 74.2 | 78.7 | 83.4 | 88.2 |
| e | min | 37.29 | 39.55 | 45.2 | 50.85 | 55.37 | 60.79 | 66.44 | 72.02 | 76.95 | 83.6 | 88.25 | 93.56 | 99.21 | 104.86 |
| s | max | 34 | 36 | 41 | 46 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 |
| min | 33 | 35 | 40 | 45 | 49 | 53.8 | 58.8 | 63.1 | 68.1 | 73.1 | 78.1 | 82.8 | 87.8 | 92.9 | |
| m | max | 11 | 12 | 13.5 | 15 | 16.5 | 18 | 19.5 | 21 | 22.5 | 24 | 26 | 28 | 30 | 32 |
注：尽可能不采用括号内的规格。