ANSI/ASME B 18.2.1 – 2012 – Bu lông kết cấu
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44046 | 43862 | 44048 | 43924 | 44050 | 1 | 39448 | 37987 | 39508 | |
d | 0.3750 | 0.5000 | 0.6250 | 0.7500 | 0.8750 | 10.000 | 11.250 | 12.500 | 13.750 | |
ds | max | 0.388 | 0.515 | 0.642 | 0.768 | 0.895 | 1.022 | 1.149 | 1.277 | 1.404 |
min | 0.360 | 0.482 | 0.605 | 0.729 | 0.852 | 0.976 | 1.098 | 1.223 | 1.345 | |
s | max | 0.688 | 0.875 | 1.062 | 1.250 | 1.438 | 1.625 | 1.812 | 2.000 | 2.188 |
min | 0.669 | 0.850 | 1.031 | 1.212 | 1.394 | 1.575 | 1.756 | 1.938 | 2.119 | |
k | max | 0.268 | 0.364 | 0.444 | 0.524 | 0.604 | 0.700 | 0.780 | 0.876 | 0.940 |
min | 0.226 | 0.302 | 0.378 | 0.455 | 0.531 | 0.591 | 0.658 | 0.749 | 0.810 | |
b | L≤6 | 1.000 | 1.250 | 1.500 | 1.750 | 2.000 | 2.250 | 2.500 | 2.750 | 3.000 |
6<L | 1.250 | 1.500 | 1.750 | 2.000 | 2.250 | 2.500 | 2.750 | 3.000 | 3.250 | |
Screw Thread | 37257 | 39569 | 38047 | 39630 | 2 | 37988 | 37258 | 38048 | 3 | |
d | 15.000 | 16.250 | 17.500 | 18.750 | 20.000 | 22.500 | 25.000 | 27.500 | 30.000 | |
ds | max | 1.531 | 1.658 | 1.785 | 1.912 | 2.039 | 2.305 | 2.559 | 2.827 | 3.081 |
min | 1.470 | 1.591 | 1.716 | 1.839 | 1.964 | 2.214 | 2.461 | 2.711 | 2.961 | |
s | max | 2.375 | 2.562 | 2.750 | 2.938 | 3.125 | 3.500 | 3.875 | 4.250 | 4.625 |
min | 2.300 | 2.481 | 2.662 | 2.844 | 3.025 | 3.388 | 3.750 | 4.112 | 4.475 | |
k | max | 1.036 | 1.116 | 1.196 | 1.276 | 1.388 | 1.548 | 1.708 | 1.869 | 2.060 |
min | 0.902 | 0.978 | 1.054 | 1.130 | 1.175 | 1.327 | 1.479 | 1.632 | 1.815 | |
b | L≤6 | 3.250 | 3.500 | 3.750 | 4.000 | 4.250 | 4.750 | 5.250 | 5.750 | 6.250 |
6<L | 3.500 | 3.750 | 4.000 | 4.250 | 4.500 | 5.000 | 5.500 | 6.000 | 6.500 |