Simpson Strong-Tie #14 x 3-1/4" Self-Drilling Screw with Wings, Flat Head - 410 Stainless Steel, Qty. 100 Flat Head 410 Stainless Steel Masonry Screws Use STN22 Hex-head washers for

Use STN22 Hex-head washers for a polished look

these screws are perfectly suited for today’s wood deck boards and exterior lumber

Designed specifically for attaching wood sheathing

Flexible design: Roofjack size accommodates pipes from 1/4" - 5-3/4"

Simpson Strong-Tie #14 x 3-1/4" Self-Drilling Screw with Wings, Flat Head - 410 Stainless Steel, Qty. 100 Flat Head 410 Stainless Steel Masonry Screws Use STN22 Hex-head washers forWhen you need to fasten wood, plywood or fiber cement board directly to steel framing without pre drilling, this Simpson Strong Tie F14C325FDC 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