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BS 3410 Table 11 Washers

BS 3410 Table 11 Washers

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
2 10 0.128

3
6 0.192
3 0.252


3/4


13/16
2 1/2 10 0.128
3 6 0.192
3
3

0.252
4

7/8

15/16
2 1/2 10 0.128
3 3 0.252

1

1 1/16
3
3

0.252
4
4 3/0 0.372

1 1/4

1 3/8

4
3 0.252
3/0 0.372

Notes:
1) All Dimensions are expressed in Inches.