BS 1842:1952

Dimensions, manufacture, material of spear-head and round-head spanners. Sizes and relationship of sizes on each spanner. Spear-head spanners with alternative angles of head: one with both heads inclined at 15°, the other with one head in line with the axis and opposite head inclined at 45°. For B.A. hexagon bolts and nuts to BS 57 or hexagon bars and rods of similar sizes. Cross References:BS 57BS 860BS 970