Simpson Strong-Tie #12 x 2-1/2" Self-Drilling Screw with Wings, Flat Head - 410 Stainless Steel, Qty. 1,800 LSTHD/STHD Strap-Tie Holdowns Square-drive recess - reduces cam-out

Square-drive recess - reduces cam-out and ensures secure driver engagement

The LSC installs at the top of the stair stringer

while coarse threads on the shank pull deck boards tightly to framing for lasting hold

The Strong-Tie HUC48Z concealed flange hanger features a G185 ZMAX galvanized finish for added corrosion resistance and requires the use of hot-dip galvanized fasteners which meet the specifications of ASTM A153

These strips are compatible with most 16 gauge straight finish nailers

Simpson Strong-Tie #12 x 2-1/2" Self-Drilling Screw with Wings, Flat Head - 410 Stainless Steel, Qty. 1,800 LSTHD/STHD Strap-Tie Holdowns Square-drive recess - reduces cam-outWhen you need to fasten wood, plywood or fiber cement board directly to steel framing without pre drilling, this Simpson Strong Tie F12C250FDB Self Drilling Flat Head Screw With Wings delivers the performance you expect. Wings create a clearance hole in the top material so the shank will not ride up, then break off as the drill point engages steel. The flat countersunk head offers a clean, flush finish and the full length machine screw threads provide