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BS 3410 Table 12 Washers

BS 3410 Table 12 Washers

Dimensions for Square / D Shaped Taper Washers to BS 3410 Table 12

Nominal size
of Bolts
Diameter of hole3
A
Tolerance + 1/32 Inch.
Overall size
B
Mean Thickness
C
3o and 5o 8o
3/8 7/16 1 3/16 1/4
1/2 9/16 1 1/4 3/16 1/4
5/8 11/16 1 1/2 3/16 1/4
3/4 13/16 1 3/4 3/16 1/4
7/8 15/16 2 3/16 1/4
1 1 1/16 2 1/4 3/16 1/4

Notes:
1) All Dimensions are expressed in Inches.
2) Angle of taper may be 3°, 5° or 8°.
3) Centre hole to be parallel to within 4 °.