GB /T 5785 – 2000 – Bu lông lục giác
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GB /T 5785 – 2000 – Bu lông lục giác
| Screw Thread | M8 | M10 | (M10) | M12 | (M12) | (M14) | M16 | (M18) | M20 | (M20) | (M22) | M24 | |||
| P | Pitch | 1 | 1 | 1.25 | 1.5 | 1.25 | 1.5 | 1.5 | 1.5 | 1.5 | 2 | 1.5 | 2 | ||
| b | L≤125 | 22 | 26 | 26 | 30 | 30 | 34 | 38 | 42 | 46 | 46 | 50 | 54 | ||
| 125＜L≤200 | 28 | 32 | 32 | 36 | 36 | 40 | 44 | 48 | 52 | 52 | 56 | 60 | |||
| L＞200 | 41 | 45 | 45 | 49 | 49 | 57 | 57 | 61 | 65 | 65 | 69 | 73 | |||
| c | max | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | 0.8 | ||
| min | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.15 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | 0.2 | |||
| da | max | 9.2 | 11.2 | 11.2 | 13.7 | 13.7 | 15.7 | 17.7 | 20.2 | 22.4 | 22.4 | 24.4 | 26.4 | ||
| ds | max=nominal size | 8.00 | 10.00 | 10.00 | 12.00 | 12.00 | 14.00 | 16.00 | 18.00 | 20.00 | 20.00 | 22.00 | 24.00 | ||
| Grade A | min | 7.78 | 9.78 | 9.78 | 11.73 | 11.73 | 13.73 | 15.73 | 17.73 | 19.67 | 19.67 | 21.67 | 23.67 | ||
| Grade B | min | 7.64 | 9.64 | 9.64 | 11.57 | 11.57 | 13.54 | 15.57 | 17.57 | 19.48 | 19.48 | 21.48 | 23.48 | ||
| dw | Grade A | min | 11.63 | 14.63 | 14.63 | 16.63 | 16.63 | 19.64 | 22.49 | 25.34 | 28.19 | 28.19 | 31.71 | 33.61 | |
| Grade B | min | 11.47 | 14.47 | 14.47 | 16.47 | 16.47 | 19.15 | 22 | 24.85 | 27.7 | 27.7 | 31.35 | 33.25 | ||
| e | Grade A | min | 14.38 | 17.77 | 17.77 | 20.03 | 20.03 | 23.36 | 26.75 | 30.14 | 33.53 | 33.53 | 37.72 | 39.98 | |
| Grade B | min | 14.20 | 17.59 | 17.59 | 19.85 | 19.85 | 22.78 | 26.17 | 29.56 | 32.95 | 32.95 | 37.29 | 39.55 | ||
| L1 | max | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | ||
| k | Nominal Size | 5.3 | 6.4 | 6.4 | 7.5 | 7.5 | 8.8 | 10.0 | 11.5 | 12.5 | 12.5 | 14.0 | 15.0 | ||
| Grade A | max | 5.45 | 6.58 | 6.58 | 7.68 | 7.68 | 8.98 | 10.18 | 11.715 | 12.715 | 12.715 | 14.215 | 15.215 | ||
| min | 5.15 | 6.22 | 6.22 | 7.32 | 7.32 | 8.62 | 9.82 | 11.285 | 12.285 | 12.285 | 13.785 | 14.785 | |||
| Grade B | max | 5.54 | 6.69 | 6.69 | 7.79 | 7.79 | 9.09 | 10.29 | 11.85 | 12.85 | 12.85 | 14.35 | 15.35 | ||
| min | 5.06 | 6.11 | 6.11 | 7.21 | 7.21 | 8.51 | 9.71 | 11.15 | 12.15 | 12.15 | 13.65 | 14.65 | |||
| k1 | Grade A | min | 3.61 | 4.35 | 4.35 | 5.12 | 5.12 | 6.03 | 6.87 | 7.9 | 8.6 | 8.6 | 9.65 | 10.35 | |
| Grade B | min | 3.54 | 4.28 | 4.28 | 5.05 | 5.05 | 5.96 | 6.8 | 7.81 | 8.51 | 8.51 | 9.56 | 10.26 | ||
| r | min | 0.4 | 0.4 | 0.4 | 0.6 | 0.6 | 0.6 | 0.6 | 0.6 | 0.8 | 0.8 | 0.8 | 0.8 | ||
| s | max=nominal size | 13.00 | 16.00 | 16.00 | 18.00 | 18.00 | 21.00 | 24.00 | 27.00 | 30.00 | 30.00 | 34.00 | 36.00 | ||
| Grade A | min | 12.73 | 15.73 | 15.73 | 17.73 | 17.73 | 20.67 | 23.67 | 26.67 | 29.67 | 29.67 | 33.38 | 35.38 | ||
| Grade B | min | 12.57 | 15.57 | 15.57 | 17.57 | 17.57 | 20.16 | 23.16 | 26.16 | 29.16 | 29.16 | 33.00 | 35.00 | ||
| Weight of per 1000 steel products(≈kg) | – | – | – | – | – | – | – | – | – | – | – | – | |||
| Length of Thread b | – | – | – | – | – | – | – | – | – | – | – | – | |||
| Screw Thread | (M27) | M30 | (M33) | M36 | (M39) | M42 | (M45) | M48 | (M52) | M56 | (M60) | M64 | |||
| P | Pitch | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 | 4 | 4 | 4 | 4 | ||
| b | L≤125 | 60 | 66 | – | – | – | – | – | – | – | – | – | – | ||
| 125＜L≤200 | 66 | 72 | 78 | 84 | 90 | 96 | 102 | 108 | 116 | – | – | – | |||
| L＞200 | 79 | 85 | 91 | 97 | 103 | 109 | 115 | 121 | 129 | 137 | 145 | 153 | |||
| c | max | 0.8 | 0.8 | 0.8 | 0.8 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | 1.0 | ||
| min | 0.2 | 0.2 | 0.2 | 0.2 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | |||
| da | max | 30.4 | 33.4 | 36.4 | 39.4 | 42.4 | 45.6 | 48.6 | 52.6 | 56.6 | 63 | 67 | 71 | ||
| ds | max=nominal size | 27.00 | 30.00 | 33.00 | 36.00 | 39.00 | 42.00 | 45.00 | 48.00 | 52.00 | 56.00 | 60.00 | 64.00 | ||
| Grade A | min | – | – | – | – | – | – | – | – | – | – | – | – | ||
| Grade B | min | 26.48 | 29.48 | 32.38 | 35.38 | 38.38 | 41.38 | 44.38 | 47.38 | 51.26 | 55.26 | 59.26 | 63.26 | ||
| dw | Grade A | min | – | – | – | – | – | – | – | – | – | – | – | – | |
| Grade B | min | 38 | 42.75 | 46.55 | 51.11 | 55.86 | 59.95 | 64.7 | 69.45 | 74.2 | 78.66 | 83.41 | 88.16 | ||
| e | Grade A | min | – | – | – | – | – | – | – | – | – | – | – | – | |
| Grade B | min | 45.20 | 50.85 | 55.37 | 60.79 | 66.44 | 71.30 | 76.95 | 82.60 | 88.25 | 93.56 | 99.21 | 104.86 | ||
| L1 | max | 6 | 6 | 6 | 6 | 6 | 8 | 8 | 10 | 10 | 12 | 12 | 13 | ||
| k | Nominal Size | 17.0 | 18.7 | 21.0 | 22.5 | 25.0 | 26.0 | 28.0 | 30.0 | 33.0 | 35.0 | 38.0 | 40.0 | ||
| Grade A | max | – | – | – | – | – | – | – | – | – | – | – | – | ||
| min | – | – | – | – | – | – | – | – | – | – | – | – | |||
| Grade B | max | 17.35 | 19.12 | 21.42 | 22.92 | 25.42 | 26.42 | 28.42 | 30.42 | 33.50 | 35.50 | 38.50 | 40.50 | ||
| min | 16.65 | 18.28 | 20.58 | 22.08 | 24.58 | 25.58 | 27.58 | 29.58 | 32.50 | 34.50 | 37.50 | 39.50 | |||
| k1 | Grade A | min | – | – | – | – | – | – | – | – | – | – | – | – | |
| Grade B | min | 11.66 | 12.8 | 14.41 | 15.46 | 17.21 | 17.91 | 19.31 | 20.71 | 22.75 | 24.15 | 26.25 | 27.65 | ||
| r | min | 1 | 1 | 1 | 1 | 1 | 1.2 | 1.2 | 1.6 | 1.6 | 2 | 2 | 2 | ||
| s | max=nominal size | 41.00 | 46.00 | 50.00 | 55.00 | 60.00 | 65.00 | 70.00 | 75.00 | 80.00 | 85.00 | 90.00 | 95.00 | ||
| Grade A | min | – | – | – | – | – | – | – | – | – | – | – | – | ||
| Grade B | min | 40.00 | 45.00 | 49.00 | 53.80 | 58.80 | 63.10 | 68.10 | 73.10 | 78.10 | 82.80 | 87.80 | 92.80 | ||
| Weight of per 1000 steel products(≈kg) | – | – | – | – | – | – | – | – | – | – | – | – | |||
| Length of Thread b | – | – | – | – | – | – | – | – | – | – | – | – | |||
