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BSI - BS 2558

Tubular Box Spanners

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Organization: BSI
Publication Date: 31 December 1954
Status: active
Page Count: 32
ICS Code (Hand-operated tools): 25.140.30
scope:

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.

Document History

BS 2558
December 31, 1954
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,...

References

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