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Same specifications, different dimensions for other parts.

Square Black Washers With Round Holes [Table 11]

BS 3410 (-11) - 1961

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For Nominal Thread Diameter

3/8

1/2

5/8

3/4

d	0, + 1/32
s
h

7/16	7/16	9/16	9/16	11/16	11/16	11/16	13/16	13/16
1-1/2	2	1-1/2	2	2	3	3	2-1/2	3
0.128	0.128	0.128	0.128	0.128	0.192	0.252	0.128	0.192

For Nominal Thread Diameter

3/4

7/8

1-1/4

d	0, + 1/32
s
h

13/16	13/16	15/16	15/16	1-1/16	1-1/16	1-1/16	1-3/8	1-3/8
3	4	2-1/2	3	3	4	4	4	4
0.252	0.252	0.128	0.252	0.252	0.252	0.372	0.252	0.372

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