Technical Standard

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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

Product Details

Published:

12/31/1954

ISBN(s):

0580345807

Number of Pages:

32

File Size:

1 file , 420 KB

Product Code(s):

00066154, 00066154, 00066154