4-40X1/4 Phil Pan Tooth washer Thread Roll Screw Full Thread Zinc Wax (Pack Qty 5,000) BC-0404REPP

Tribular thread rolling screw with a gently rounded top surface and a captive, free-spinning external tooth lock washer manufactured as one assembly. As each lobe of the screw moves through the pilot hole in the nut material, it forms and work-hardens the nut thread metal, producing an uninterrupted grain flow For drilled, punched or corred holes in all ductile metals and punch extruded metals. Eliminated chips, requires low drive torque, and provides excellent resistance to vibrational loosening. The washer/screw assembly makes this locking screw with the washYou may also like 4-40X1/4 Slotted Pan Machine Screw Fully Threaded Zinc Yellow ROHS (Pack Qty 10,000) BC-0404MSPY.