Acorn International 2-1/2 In. Winged Self-Drilling Sheet Wood To Metal Screw (250 Ct.) rack This steel torsion spring includes

This steel torsion spring includes a stationary cone and winding cone attached to opposite ends

radius round corners

and connect to a gas tank

Compresses when cured preventing bowing issues with drywall board

Acorn International 2-1/2 In. Winged Self-Drilling Sheet Wood To Metal Screw (250 Ct.) rack This steel torsion spring includesWood to metal screws are made from C1022 steel, case hardened for fastening wood to steel or aluminum. #10 24 screw is a Phillips wafer head. #12 24 (#14 Head) and #14 20 screws are star drive flat head. The star drive flat head reduces camout and end load, handles greater torque than Phillips or square drive, and eliminates spinning and fastener damage. For star drive use a T30 drill bit (not included). Reamer wings drill through wood and snap off