Dimensions for Square Washers with Round Holes to BS 3410 Table 11

Dimensions for Square Washers with Round Holes to BS 3410 Table 11

Nominal size
of Bolts
Diameter of hole A
Tolerance + 1/32 inch.
Outside Square
B
Thickness C
Tolerance +/- 1 gauge
Inch.S.W.G.Inch.

3/8

7/16
1 1/2
10

0.128
2

1/2

9/16
1 1/2
10

0.128
2


5/8


11/16
2100.128

3
60.192
30.252


3/4


13/16
2 1/2100.128
360.192
3
3

0.252
4

7/8

15/16
2 1/2100.128
330.252

1

1 1/16
3
3

0.252
4
43/00.372

1 1/4

1 3/8

4
30.252
3/00.372