Simpson Strong-Tie #12 x 2" Self-Drilling Screw with Wings, Flat Head - 410 Stainless Steel, Qty. 1,000 Type 304 Stainless Steel Wedge Anchors If you have a nominal

If you have a nominal post measuring 3-1/2x5-1/2" you will need an ABU46Z Post base

CMST only - Use every other triangle hole if the wood tends to split

Drill point tip penetrates 22 to 18-gauge steel without predrilling

Lumber Size: Intended for use with 6x4 posts/columns

Simpson Strong-Tie #12 x 2" Self-Drilling Screw with Wings, Flat Head - 410 Stainless Steel, Qty. 1,000 Type 304 Stainless Steel Wedge Anchors If you have a nominalWhen you need to fasten wood, plywood or fiber cement board directly to steel framing without pre drilling, this Simpson Strong Tie F12C200FDM 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