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BS 3410 Table 6 Washers

BS 3410 Table 6 Washers

Dimensions for Large Diameter Washers to BS 3410 Table 6

Nominal
size of Bolts
or screw
Diameter of hole
A
Outside diameter
B
Thickness1
C
max. min. max. min.
Inch Inch S.W.G. Inch
1/4 0.270 0.265 1.000 0.995 16 0.064
5/16 0.333 0.328 1.125 1240 15 0.072
3/8 0.395 0.390 1.375 1365 14 0.080
7/16 0.458 0.453 1500 1490 13 0.092
1/2 0.520 0.515 1625 1615 12 0.104
9/16 0.593 0.588 1750 1740 11 0.116
5/8 0.656 0.651 2000 1990 10 0.128
3/4 0.781 0.776 2250 2240 9 0.144
7/8 0.906 0.901 2500 2480 8 0.160
1 1.031 1.026 2750 2730 6 0.192

Notes:
1) Subject to the normal manufacturing tolerances on the sheet or strip as specified in the appropriate British Standards.