BS 1768 – 1963 – Bu lông lục giác
Screw Thread | 43922 | 42491 | 44046 | 42552 | 43862 | (9/16) | 44048 | 43924 | |
PP | UNC | 20 | 18 | 16 | 14 | 13 | 12 | 11 | 10 |
UNF | 28 | 24 | 24 | 20 | 20 | 18 | 18 | 16 | |
ds | max | 0.25 | 0.3125 | 0.375 | 0.4375 | 0.5 | 0.5625 | 0.625 | 0.75 |
min | 0.2465 | 0.309 | 0.3715 | 0.4335 | 0.496 | 0.5585 | 0.619 | 0.744 | |
s | max | 0.4375 | 0.5 | 0.5625 | 0.625 | 0.75 | 0.8125 | 0.9375 | 1.125 |
min | 0.4305 | 0.493 | 0.5545 | 0.617 | 0.742 | 0.8045 | 0.9295 | 1.115 | |
e | max | 0.505 | 0.577 | 0.65 | 0.722 | 0.866 | 0.938 | 1.083 | 1.3 |
da | max | 0.421 | 0.483 | 0.545 | 0.605 | 0.73 | 0.792 | 0.918 | 1.1 |
min | 0.411 | 0.473 | 0.535 | 0.595 | 0.72 | 0.782 | 0.908 | 1.090 | |
k | max | 0.163 | 0.211 | 0.243 | 0.291 | 0.323 | 0.371 | 0.403 | 0.483 |
min | 0.153 | 0.201 | 0.233 | 0.281 | 0.313 | 0.361 | 0.393 | 0.463 | |
r | max | 0.025 | 0.025 | 0.025 | 0.025 | 0.025 | 0.045 | 0.045 | 0.045 |
min | 0.015 | 0.015 | 0.015 | 0.015 | 0.015 | 0.02 | 0.02 | 0.02 | |
d1 | max | 0.084 | 0.1 | 0.117 | 0.117 | 0.152 | 0.152 | 0.184 | 0.184 |
min | 0.079 | 0.095 | 0.112 | 0.112 | 0.146 | 0.146 | 0.177 | 0.177 |
Screw Thread | 44050 | 1 | 39448 | 37987 | (1-3/8) | 37257 | 38047 | 2 | |
PP | UNC | 9 | 8 | 7 | 7 | 6 | 6 | 5 | |
UNF | 14 | 12 | – | – | – | – | – | – | |
ds | max | 0.875 | 1 | 1.125 | 1.25 | 1.375 | 1.5 | 1.75 | 2 |
min | 0.867 | 0.992 | 1.117 | 1.242 | 1.365 | 1.49 | 1.74 | 1.99 | |
s | max | 13.125 | 1.5 | 16.875 | 1.875 | 20.625 | 2.25 | 2.625 | 3 |
min | 13.005 | 1.488 | 16.575 | 1.83 | 20.175 | 2.205 | 2.565 | 2.94 | |
e | max | 1.515 | 1.732 | 1.948 | 2.165 | 2.382 | 2.598 | 3.031 | 3.464 |
da | max | 1.285 | 1.473 | 1.641 | 1.813 | 2.001 | 2.188 | 2.543 | 2.918 |
min | 1.275 | 1.463 | 1.625 | 1.797 | 1.985 | 2.172 | 2.527 | 2.902 | |
k | max | 0.563 | 0.627 | 0.718 | 0.813 | 0.878 | 0.974 | 1.134 | 1.263 |
min | 0.543 | 0.597 | 0.678 | 0.773 | 0.838 | 0.934 | 1.074 | 1.203 | |
r | max | 0.065 | 0.095 | 0.095 | 0.095 | 0.095 | 0.095 | 0.095 | 0.095 |
min | 0.04 | 0.06 | 0.06 | 0.06 | 0.06 | 0.06 | 0.06 | 0.06 | |
d1 | max | 0.184 | 0.222 | 0.222 | 0.254 | 0.254 | 0.29 | 0.353 | 0.353 |
min | 0.177 | 0.213 | 0.213 | 0.244 | 0.244 | 0.28 | 0.343 | 0.343 |