BS 1083 - 1965 Precision Hexagon Slotted Nuts - B.S.W. & B.S.F. threads


Unit: inch
Screw Thread
d
1/4 5/16 3/8 7/16 1/2 9/16 5/8 3/4
PP BSW
BSF
k max
min
w max
min
n max
min
t Approx.
s max
min
dw max
min
e max
20 18 16 14 12 12 11 10
26 22 20 18 16 16 14 12
0.260 0.280 0.312 0.375 0.437 0.500 0.562 0.687
0.250 0.270 0.302 0.365 0.427 0.490 0.552 0.677
0.170 0.190 0.222 0.235 0.297 0.313 0.375 0.453
0.160 0.180 0.212 0.225 0.287 0.303 0.365 0.443
0.100 0.100 0.100 0.135 0.135 0.175 0.175 0.218
0.090 0.090 0.090 0.125 0.125 0.165 0.165 0.208
0.090 0.090 0.090 0.140 0.140 0.187 0.187 0.234
0.445 0.525 0.600 0.710 0.820 0.920 1.010 1.200
0.438 0.518 0.592 0.702 0.812 0.912 1.000 1.190
0.428 0.508 0.582 0.690 0.800 0.900 0.985 1.175
0.418 0.498 0.572 0.680 0.790 0.890 0.975 1.165
0.51 0.61 0.69 0.82 0.95 1.06 1.17 1.39
Screw Thread
d
7/8 1 1-1/8 1-1/4 1-3/8 1-1/2 1-3/4 2
PP BSW
BSF
k max
min
w max
min
n max
min
t Approx.
s max
min
dw max
min
e max
9 8 7 7 - 6 5 4.5
11 10 9 9 8 8 7 7
0.750 0.875 1.000 1.125 1.250 1.375 1.625 1.750
0.740 0.865 0.990 1.105 1.230 1.355 1.605 1.730
0.516 0.595 0.720 0.797 0.922 1.047 1.250 1.282
0.506 0.585 0.710 0.777 0.902 1.027 1.230 1.262
0.218 0.260 0.260 0.300 0.300 0.300 0.343 0.426
0.208 0.250 0.250 0.290 0.290 0.290 0.333 0.416
0.234 0.280 0.280 0.328 0.328 0.328 0.375 0.468
1.300 1.480 1.670 1.860 2.050 2.220 2.580 2.760
1.288 1.468 1.640 1.815 2.005 2.175 2.520 2.700
1.273 1.453 1.620 1.795 1.985 2.155 2.495 2.675
1.263 1.443 1.610 1.785 1.975 2.145 2.485 2.665
1.50 1.71 1.93 2.15 2.37 2.56 2.98 3.19
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