Language
1/4
5/16
3/8
7/16
1/2
9/16
5/8
3/4
7/8
1
1-1/8
1-1/4
(1-3/8)
1-1/2
(1-5/8)
1-3/4
2
2-1/4
2-1/2
2-3/4
3
(3-1/4)
3-1/2
(3-3/4)
4
4-1/2
5
5-1/2
6
(Non-preferred) dimensions in parentheses.
BS 916 - 1953
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