Simpson Strong-Tie #12 x 2-1/2" Self-Drilling Screw with Wings, Flat Head - 410 Stainless Steel, Qty. 100 MST/HST Strap Ties Self-Tapping Thread Design: Cuts into

Self-Tapping Thread Design: Cuts into concrete cleanly—no expansion or secondary setting required

these heavy-duty screws provide consistent performance in structural

Avoid underdriving and overdriving to maintain the integrity of the seal

ZMAX Finish: Provides heavy-duty corrosion resistance for outdoor and pressure-treated lumber use

Lumber Size: Intended for use with 4x beams and 8x posts/columns

Simpson Strong-Tie #12 x 2-1/2" Self-Drilling Screw with Wings, Flat Head - 410 Stainless Steel, Qty. 100 MST/HST Strap Ties Self-Tapping Thread Design: Cuts intoWhen you need to fasten wood, plywood or fiber cement board directly to steel framing without pre drilling, this Simpson Strong Tie F12C250FDC 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