Simpson Strong-Tie #12 4" Self-Drilling Screw, Hex-Washer Head - 316 Stainless Steel, Qty. 1,000 Tapcon Insert the 3/8" threaded rod

Insert the 3/8" threaded rod

Designed for high-corrosion environments

Makes installation fast while automatically countersinking the tie into the facade material

The corner plates use 9/16" punched holes

No Pre-Drilling Needed – Patented tip drives easily into wood

Simpson Strong-Tie #12 4" Self-Drilling Screw, Hex-Washer Head - 316 Stainless Steel, Qty. 1,000 Tapcon Insert the 3/8" threaded rodBuilt to stand up to the harshest environments, the Simpson Strong Tie T12400HDUM Self Drilling Hex Washer Head Screws in 316 stainless steel offer unmatched corrosion resistance for demanding applications. These screws are engineered for fastening into 16 to 12 gauge steel, eliminating the need for pre drilling and streamlining your installation. Whether you're working in coastal construction, wastewater facilities, or any high exposure environment,