Simpson #12 x 2-1/2" Self-Drilling Flat-Head Screw with Wing, 410 Stainless Steel Combination Mill Drill Lathe The SUR46 is designed to

The SUR46 is designed to support both solid sawn and engineered wood products used in wood construction applications

The ribbed wafer head and drill point work together to seat flush and bite through metal without pre-drilling

Stronger than angled nailing or screw fastening - delivers a more secure structural connection

corrosion-resistant coating on each carbon steel pin

Simpson #12 x 2-1/2" Self-Drilling Flat-Head Screw with Wing, 410 Stainless Steel Combination Mill Drill Lathe The SUR46 is designed toSimpson #12 x 2 1 2" Self Drilling Flat Head Screw with Wing in 410 Stainless Steel is a precision engineered fastener from Simpson designed for attaching wood, plywood, and fiber cement to steel substrates up to 0. 209" thick. The winged drill point bores a clean clearance hole through the wood layer so the workpiece stays flush against the steel rather than riding up the shank then the wings snap off cleanly as the point contacts the steel, letting