Our Products - Socket Head Caps Screws

Inch Series - BA, BSW, BSF
Notes:
1. The Screws will generally conform to BS:@$&)
2. Threads will conform to class BS:B4 for BSW & BSF threads and to Normal class of BS:84 for BA threads.
3. All Dimensions are in inches.

Thread Size 0 2 3 4 1/8 3/16 1/4 5/16 3/8 7/16 1/2 5/8 3/4 7/8 1
Pitch BA BA BA BA BSW BSW /BSF BSW /BSF BSW /BSF BSW /BSF BSW /BSF BSW /BSF BSW /BSF BSW /BSF BSW /BSF BSW /BSF
BA 25.4 31.4 34.8 38.5 -
T.P.I. BSW 40 24 20 18 16 14 12 11 10 9 8
BSF 32 26 22 20 18 16 14 12 11 10
A Max. 0.375 0.312 0.250 0.219 0.219 0.312 0.375 0.437 0.562 0.625 0.750 0.875 1.000 1.125 1.312
B Max. 0.2362 0.1850 0.1614 0.1412 0.1250 0.1875 0.2500 0.3125 0.3750 0.4375 0.5000 0.6250 0.7500 0.8750 1.000
E Min. 0.080 0.063 0.055 0.048 0.053 0.065 0.095 0.119 0.143 0.166 0.190 0.238 0.285 0.333 0.380
F Min. 0.133 0.089 0.075 0.066 0.066 0.089 0.120 0.151 0.182 0.213 0.245 0.307 0.370 0.432 0.495
H Max. 0.236 0.187 0.161 0.142 0.125 0.187 0.250 0.312 0.375 0.437 0.500 0.625 0.750 0.875 1.000
da Max 0.2642 0.2132 0.1854 0.1617 0.1450 0.2155 0.2870 0.3465 0.4150 0.4835 0.5520 0.6890 0.8280 0.9630 1.1000
W. Nom. 3/16 5/32 1/8 3/32 3/32 5/32 3/16 7/32 5/16 5/16 3/8 1/2 9/16 9/16 5/8