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  • BSI
    BS 2558:1954 Specification for tubular box spanners
    Edition: 1954
    $411.69
    / user per year

Description of BS 2558:1954 1954

This British Standard relates to tubular box spanners suitable for the following hexagon standards or ranges:

BS 1768, Unified precision hexagon bolts, screws, nuts (UNC and UNF threads) and plain washers. Normal series.

BS 1769, Unified black hexagon bolts, screws, nuts (UNC and UNF) and plain washers. Heavy series.

BS 1981, Unified machine screws and machine screw nuts.

BS 1083, Precision hexagon bolts, screws, nuts (BSW and BSF threads) and plain washers.

BS 916, Black bolts and nuts. Hexagon and square, BSW and BSF.

BS 57, B.A. screws, bolts, nuts and plain washers.

Whitworth large hexagons (originally specified in BS 190, now obsolete).

Metric hexagons.

NOTE The spanners specified are also suitable for all the bolt sizes given in BS A1021) and for all the bolt head and most of the nut sizes used by the petroleum industry and specified in BS 17502).

The specification includes clauses for material, heat treatment, marking, tests and dimensional details together with requirements for the tommy bars by which the spanners are operated.



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.

Standard NumberBS 2558:1954
TitleSpecification for tubular box spanners
StatusConfirmed
Publication Date1954-12-31
Related National Standard OfISO 2236
DescriptorsDesignations, Hexagonal-head fasteners, Torsion testing, Steels, Dimensions, Wrenches, Imperial system, Box spanners, Threads, Performance testing, Marking, Size, Spanners, Thread forms
ICS25.140.30 Hand-operated tools
CommitteeMTE/15
ISBN0 580 34580 7
PublisherBSI
Pages32

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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