5 C级六角头螺栓GB/T 5780、5781—2000标准
C级六角头螺栓GB5780、GB5781标准
C级六角头螺栓尺寸规格见表4.1-6。
表4.1-6 C级六角头螺栓尺寸规格(mm)
用途:
主要用于表面比较粗糙、对精度要求不高的钢(本)结构、机械、设备上
螺纹规格 d (8g) | M5 | M6 | M8 | M10 | M12 | (M14) | M16 | (M18) | M20 | (M22) | M24 | (M27) | |
b | l≤125 | 16 | 18 | 22 | 26 | 30 | 34 | 38 | 42 | 46 | 50 | 54 | 60 |
125< l≤200 | 22 | 24 | 28 | 32 | 36 | 40 | 44 | 48 | 52 | 56 | 60 | 66 | |
l>200 | 35 | 37 | 41 | 45 | 49 | 53 | 57 | 61 | 65 | 69 | 73 | 79 | |
a max | 2.4 | 3 | 4 | 4.5 | 5.3 | 6 | 6 | 7.5 | 7.5 | 7.5 | 9 | 9 | |
e min | 8.63 | 10.89 | 14.2 | 17.59 | 19.85 | 22.78 | 26.17 | 29.56 | 32.95 | 37.29 | 39.55 | 45.2 | |
K | 公称 | 3.5 | 4 | 5.3 | 6.4 | 7.5 | 8.8 | 10 | 11.5 | 12.5 | 14 | 15 | 17 |
S | max | 8 | 10 | 13 | 16 | 18 | 21 | 24 | 27 | 30 | 34 | 36 | 41 |
min | 7.64 | 9.64 | 12.57 | 15.57 | 17.57 | 20.16 | 23.16 | 26.16 | 29.16 | 33 | 35 | 40 | |
l①长度范围 | GB/T 5780 | 25-50 | 30-60 | 40-80 | 40-100 | 55-120 | 60-140 | 65-160 | 80-180 | 80-200 | 90-220 | 100-240 | 110-260 |
GB/T 5781 | 10-50 | 12-60 | 16-80 | 20-100 | 25-130 | 30-140 | 30-160 | 35-180 | 40-200 | 45-220 | 50-240 | 55-280 |
续表4.1-6:
螺纹规格 d (8g) | M30 | (M33) | M36 | (M39) | M42 | (M45) | M48 | (M52) | M56 | (M60) | M64 | |
b | l≤125 | 66 | 72 | — | — | — | — | — | — | — | — | — |
125< l≤200 | 72 | 78 | 84 | 90 | 96 | 102 | 108 | 116 | — | — | — | |
l>200 | 85 | 91 | 97 | 103 | 109 | 115 | 121 | 129 | 137 | 145 | 153 | |
a max | 10.5 | 10.5 | 12 | 12 | 13.5 | 13.5 | 15 | 15 | 16.5 | 16.5 | 18 | |
e min | 50.85 | 55.37 | 60.79 | 66.44 | 72.02 | 76.95 | 82.6 | 88.25 | 93.56 | 99.21 | 104.86 | |
K | 公称 | 18.7 | 21 | 22.5 | 25 | 26 | 28 | 30 | 33 | 35 | 38 | 40 |
S | max | 46 | 50 | 55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 |
min | 45 | 49 | 53.8 | 58.8 | 63.8 | 68.1 | 73.1 | 78.1 | 82.8 | 87.8 | 92.8 | |
l①长度范围 | GB/T 5780 | 120-300 | 130-320 | 140-320 | 150-400 | 180-420 | 180-440 | 200-480 | 200-500 | 240-500 | 240-500 | 260-500 |
GB/T 5781 | 60-300 | 65-360 | 70-360 | 80-400 | 80-420 | 90-440 | 100-480 | 100-500 | 110-500 | 120-500 | 120-500 |
注:尽可能不采用括号内的规格。
①长度系列为10、12、16、20〜50 (5进级)、(55)、60、(65)、70〜150(10进级)、180〜500mm (20mm进级)。