BS 57:1951现行
Specification. B.A. screws bolts and nuts
出版：British Standards Institution
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基本信息
标准编号： BS 57:1951
发布时间：1951/3/31 0:00:00
标准类别：Standard
出版单位：British Standards Institution
标准页数：22
标准简介
Heads: cheese, round, countersunk, raised-countersunk, hexagonal; hexagonal nuts, ordinary and locknut; range No. 0 to No. 16 B.A. Standard lengths of screws.
标准备注
© British Standards Institution 2013
Amendment notes:
AMD 1528 published 15 August 1974
PD 4329 published 15 October 1961
PD 5901 published 15 August 1966
替代本标准的新标准
等同采用的国际标准
AS B85-1953 - Identical
