BS 1421:1947:1974 Edition
$102.76
Picks, beater picks and mattocks
Published By | Publication Date | Number of Pages |
BSI | 1974 | 18 |
Eight implements in 28 weights and sizes comprising: navvy picks with chisel and point, and double point ends; beater picks with point and fish-tail, and point and tee ends; mattocks with point and mattock, cutter and mattock, and chisel and axe ends. Dimensions of eyes and implements; quality and hardness of steel: tolerances on dimensions and tests. Requirements for helves.