The award was given to a PM low alloy steel lever and screw block that operate in Craftsman Grip Master locking pliers. The lever allows the user to choose between the locking and non-locking mode. The complex multi-level parts are made to a density of 6.8 g/cm³. They have an ultimate tensile strength of 130,000 psi, a transverse rupture strength of 210,000 psi, a fatigue limit of 41,000 psi and a 32HRC hardness. Secondary operations include drilling and tapping holes in the screw block, heat treating, and a black oxide finish for corrosion protection. The screw block is riveted to a hardened steel metal top handle assembly.
Post time: Jul-09-2017