
Specification for black bolts, screws and nuts, hexagon and square, with B.S.W. threads, and partly machined bolts, screws and nuts, hexagon and square, with B.S.W. or B .S.F. threads
出版:British Standards Institution

专家解读视频
Dimensions of: hexagon and square bolts, screws and nuts with B.S.W. threads; bolts and screws faced under the head (with or without turning on the shank), hexagon and square nuts faced on one or both sides and hexagon lock-nuts, with B.S.W. or B.S.F. threads. Material, chamfering and facing, squareness of thread to face of nuts, drilled holes, split-pin sizes, stock lengths of hexagon head black bolts in sizes up to 1 in.
© British Standards Institution 2013
General notes:
This standard is withdrawn as it is no longer used. It was previously declared obsolescent
Amendment notes:
PD 1894 published 15 May 1954
PD 4164 published 15 May 1961
PD 4331 published 15 October 1961
PD 5906 published 11 August 1966