13 A级和B级粗牙和细牙六角开槽薄螺母GB/T 6181— 1986、GB/T 9459—1988标准
A级和B级粗牙和细牙六角开槽薄螺母GB6181— 1986、GB9459—1988标准
A级和B级粗牙和细牙六角开槽薄螺母的尺寸规格、质量见表4.3-20〜表4.3-22。
表4.3-20 A级和B级粗牙和细牙六角开槽薄螺母的尺寸规格（mm）
| 螺纹规格（6H） | D | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | — | M20 | — | M24 | — | M30 | — | M36 |
| DxP | — | — | M8x1 | M10x1 | M12x1.5 | (M14x1.5) | M16x1.5 | (M18x1.5) | M20x2 | (M22x1.5) | M24x2 | (M27x2) | M30x2 | (M33x2) | M36x3 | |
| — | — | — | M10x1.25 | M12x1.25 | — | — | — | M20x1.5 | — | — | — | — | — | — | ||
| dw min | 6.9 | 8.9 | 11.6 | 14.6 | 16.6 | 19.6 | 22.5 | 24.8 | 27.7 | 31.4 | 33.2 | 38 | 42.7 | 46.6 | 51.1 | |
| e min | 8.79 | 11.05 | 14.38 | 17.77 | 20.03 | 23.35 | 26.75 | 29.56 | 32.95 | 37.29 | 39.55 | 45.2 | 50.85 | 55.37 | 60.79 | |
| s | max | 8 | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 34 | 36 | 41 | 46 | 50 | 55 |
| min | 7.78 | 9.78 | 12.73 | 15.73 | 17.73 | 20.67 | 23.67 | 26.16 | 29.16 | 33 | 35 | 40 | 45 | 49 | 53.8 | |
| m max | 5.1 | 5.7 | 7.5 | 9.3 | 12 | 14.1 | 16.4 | 17.6 | 20.3 | 21.8 | 23.9 | 26.7 | 28.6 | 32.5 | 34.7 | |
| m’ rain | 3.84 | 4.32 | 5.71 | 7.15 | 9.26 | 10.7 | 12.6 | 13.5 | 15.2 | 16.4 | 18.1 | 20.3 | 21.8 | 24.7 | 26.5 | |
| W | max | 3.1 | 3.2 | 4.5 | 5.3 | 7 | 9.1 | 10.4 | 11.6 | 14.3 | 14.8 | 15.9 | 18.7 | 19.6 | 23.5 | 25.7 |
| min | 2.8 | 2.9 | 4.2 | 5 | 6.64 | 8.74 | 9.97 | 10.9 | 13.6 | 14.1 | 15.2 | 17.86 | 18.76 | 22.66 | 24.86 | |
| n min | 1.4 | 2 | 2.5 | 2.8 | 3.5 | 3.5 | 4.5 | 4.5 | 5.5 | 7 | ||||||
| 开口销 | 1.2×12 | 1.6×14 | 2x 16 | 2.5×20 | 3.2×22 | 3.2×26 | 4×28 | 4×32 | 4×36 | 5×40 | 5×45 | 6.3×50 | 6.3×60 | 6.3×65 | ||
注：尽可能不采用括号内的规格。
表4.3-21 A和B级六角开槽薄螺母的质量（kg)
每1000件钢制品的大约质量
| 螺纹规格 | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | M20 | M24 | M30 | M36 |
| 质量 | 0.96 | 1.71 | 3.87 | 7.35 | 11 | 13.38 | 27.67 | 52.74 | 88.88 | 186.1 | 332.9 |
注：表列规格为商品规格。尽可能不采用括号内的规格。
表4.3-22 A和B级细牙六角开槽螺母的质量（kg)
每1000件钢制品的大约质量
| 规格 | M8xl | Ml0xl | (Ml0xl.25) | M12xl.5 | (M12xl.25) | (M14x 1.5) | M16x 1.5 | (M18xl.5) | M20x2 | (M20xl.5) | (M22xl.5) | M24x2 | (M27x2) | M30x2 | (M33x2) | M36x3 |
| 质量 | 3.87 | 7.35 | 7.35 | 11 | 11 | 18.41 | 27.67 | 36.11 | 52.74 | 52.74 | 73.16 | 88.88 | 136.9 | 186.1 | 252.1 | 332.9 |