5/16-24 x 3-1/4 Elco DrilIt / Hex Washer Head / Steel / Stalgard / QTY 500 Serrations on underside of hex

Serrations on underside of hex washer head lock against the fixture

7X1 1/4 Phillips Bugle Head Coarse Thread Drywall Screw Black Phosphate Particle Board

Tap-Flex® Thread-Forming Structural Screws are thread-forming

DeWALT DFM12722 blue concrete screw anchor

6X1 3/4 Phillips Bugle Head Coarse Thread Drywall Screw Black Phosphate Particle Board

5/16-24 x 3-1/4 Elco DrilIt / Hex Washer Head / Steel / Stalgard / QTY 500 Serrations on underside of hexDril Flex Structural Screws are dual heat treated self drilling tapping screws that provide the strength, ductility and resistance to embrittlement required for critical applications. Features & Specs High hardness point and lead threads for drilling and tapping Stalgard and Stalgard SUB Coatings provide improved corrosion resistance as well as enhanced galvanic compatibility in dissimilar metal applications, including those involving aluminum,