BS 1768 – 1963 (2) – Bu lông lục giác
Thread Size | 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 | |
da | max | 0.2500 | 0.3125 | 0.3750 | 0.4375 | 0.5000 | 0.5625 | 0.6250 | 0.7500 |
min | 0.2465 | 0.3090 | 0.3715 | 0.4335 | 0.4960 | 0.5585 | 0.6190 | 0.7440 | |
s | max | 0.4375 | 0.5000 | 0.5625 | 0.6250 | 0.7500 | 0.8125 | 0.9375 | 11.250 |
min | 0.4305 | 0.4930 | 0.5545 | 0.6170 | 0.7420 | 0.8045 | 0.9295 | 11.150 | |
e | max | 0.505 | 0.577 | 0.650 | 0.722 | 0.866 | 0.938 | 1.083 | 1.300 |
dw | max | 0.421 | 0.483 | 0.545 | 0.605 | 0.730 | 0.792 | 0.918 | 1.100 |
min | 0.411 | 0.473 | 0.535 | 0.595 | 0.720 | 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 | 0.020 | 0.020 | 0.020 |
Thread Size | 44050 | 1 | 39448 | 37987 | (1-3/8) | 37257 | 38047 | 2 | |
PP | UNC | 9 | 8 | 7 | 7 | 6 | 6 | 5 | |
UNF | 14 | 12 | / | / | / | / | / | / | |
da | max | 0.8750 | 10.000 | 11.250 | 12.500 | 13.750 | 15.000 | 17.500 | 20.000 |
min | 0.8670 | 0.9920 | 11.170 | 12.420 | 13.650 | 14.900 | 17.400 | 19.900 | |
s | max | 13.125 | 15.000 | 16.875 | 18.750 | 20.625 | 22.500 | 26.250 | 30.000 |
min | 13.005 | 14.880 | 16.575 | 18.300 | 20.175 | 22.050 | 25.650 | 29.400 | |
e | max | 1.515 | 1.732 | 1.948 | 2.165 | 2.382 | 2.598 | 3.031 | 3.464 |
dw | 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 | 0.040 | 0.060 | 0.060 | 0.060 | 0.060 | 0.060 | 0.060 | 0.060 |