British Standard Specification black bolts screws and nuts hexagon and square, with B.S.W. threads, andpartly machines bolts, screws and nuts, hexagon and square with B.S.W. or B.S.F threads
By: British Standards Institution.
Series: BS 916
Publisher: B.S.I.
Published: 1953
Place of publication: London
Language: eng
Number of pages: 19