SELF-TAPPING SCREW, FLANGE HEX HEAD, PKG OF 100, ITW TEKS 21340, #12 X 1" TEKS #12 X 1 IN. ZINC-PLATED STEEL HEX-HEAD SELF-TAPPING DRILL-POINT SCREWS PROVIDE SECURE METAL TO METAL FASTENING AND STRONG HOLDING POWER WITHOUT THE NEED TO PRE-DRILL. INSTALL WITH A STANDARD SCREW AND A 5/16 IN. HEX-DRIVE BIT (NOT INCLUDED).