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BS 2558 PDF
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Specification for tubular box spanners
| Published by | Publication Date | Number of Pages |
| BSI | 12/31/1954 | 32 |
BS 2558 – Specification for tubular box spanners
Steels for spanners and tommy bars; hardness figures, performance test. Two grades of spanner. Dimensions: unified precision hexagons, normal series, in BS 1768; Unified black hexagons, heavy series, in BS 1769; Unified machine screw hexagons in BS 1981; precision hexagons B.S.W. and B.S.F. in BS 1083; black hexagons in BS 916; B.A. hexagons in BS 57; Whitworth large hexagons (originally in BS 190, now obsolete); metric hexagons.
Cross References:
BS 57
BS 192
BS 860
BS 916
BS 970
BS 1083
BS 1750
BS 1768
BS 1769
BS 1981
BS 2708
A 102
Supplement No. 1 to BS 2558
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