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
| File Size : | 1
file
, 420 KB |
| ISBN(s) : | 0580345807 |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 32 |
| Product Code(s) : | 66154, 66154, 00066154 |
| Published : | 12/31/1954 |
