Acorn S-WM14314G250 Metal Building Screws, 3-1/4" SpecialDiscount Back rolling is suggested when

Back rolling is suggested when spraying

Heavy-duty design offers 175 lbs of tensile strength

but that is also bird friendly

perfect in its simplicity

Acorn S-WM14314G250 Metal Building Screws, 3-1/4" SpecialDiscount Back rolling is suggested whenWood 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