Abstract: A threaded locking beam nut having a plurality of locking beams configured such that the inside edge surface of each locking beam has a radially inwardly angled surface thereby forming substantially a V-shaped channel between adjacent beams.

Abstract: A nut punching apparatus has a striking punch (1), a caulking die (2), a nut feeding guide (10) having a punch passage (11) and a nut delivery opening (12) perpendicular to the passage, and a driving means (14) moving the guide along the punch. The nut ‘N’ fed through the opening is pushed into a transfer zone located ahead the punch (1) while the guide (10) is at its foremost position. This guide is retracted to its rearmost position to allow the punch to cooperate with the die (2) to punch the nut ‘N’ onto a metal plate ‘W’. The apparatus has a positioning pin (20) through the punch so that its fore end portion reciprocates taking a foraward position ahead the punch and a retracted position. The pin (20) penetrates a threaded bore of the nut ‘N’ at the transfer zone, such that the projected fore end portion of the pin (20) passing through the nut ‘N’ engages with a positioning aperture (30) formed in the metal plate ‘W’.

Abstract: The fastener comprises, in combination, a screw having a threaded shaft, and a fastening strip or sheet having a raised portion provided with an aperture being preformed to have an at least partly helical threadform-defining edge shaped and dimensioned to matingly receive the threaded shaft of the screw means. The crests comprising the threaded shaft of the screw means have an asymmetrical surface profile in the axial direction of the threaded shaft which enables the shaft to withstand greater applied torque.

Abstract: A broaching device and method for enlarging an opening, hollow or cavity in a workpiece comprises a broaching tool which is mounted on, or formed on, either the shaft or the nut of a ballscrew drive unit which includes a ballscrew shaft and a ballscrew nut.