4-40X5/16 6 Lobe Flat Thread Rolling Screws Thread Rolling Screw Fully Thread Zinc & Wax (Pack Qty 10,000) BC-0405RTF

6 Lobe Flat Thread Rolling Screws Thread Rolling Screw Fully Thread Zinc & Wax

For drilled, punched or corred holes in all ductile metals and punch extruded metals. Eliminates chips, requires low drive torque and provides excel lent resistance to vibrational loosening