Abstract: A drill and thread forming threaded fastener having a roll threaded shank constructed at one end for selective engagement with a driving tool, a forged drill point at the other end of the shank comprising a generally cylindrical section adjacent to said threaded shank and terminating in a generally paraboloidal tip section, a pair of diametrically opposed flutes occupying substantially entire diametrically opposed quadrants and having longitudinally extending generally planar surfaces located substantially in a diametric plane containing the axis of the fastener, the radially outer margins of which form cutting edges.

Abstract: A double-blow header, a fixed die, a tool or punch slide, a crankshaft operably connected to the tool slide for reciprocating the tool slide toward and away from the die, a punch carrier movably supported on the tool slide, a plurality of punch assemblies carried by the punch carrier, each of the punch assemblies comprising a punch and punch knock-out pin and a pivoted punch knock-out lever for advancing the punch knock-out pin in the punch when moved in one direction about its pivot, a new and improved punch knock-out actuating mechanism including a reciprocal rod mounted on a fixed part of the machine and extending in the direction of the tool slide, a lever for actuating the punch knock-out levers of the punch assemblies, a pivoted lever arm for moving the reciprocal rod, and an adjustable timing cam operated at one-half the speed of the crankshaft for swinging the lever arm and thereby actuating a knock-out lever of a punch assembly through the rod when the tool slide recedes from the fixed die.