1/4-20 x 4 Elco Bi-Flex / Hex Washer Head / 18-8 Stainless / Stalgard / QTY 500 10X4 Phillips Bugle Head Coarse

10X4 Phillips Bugle Head Coarse Thread Drywall Screw Black Phosphate Particle Board

1/4" x 3-1/4" DeWALT blue concrete screws

Brand part # DFM12735

Solar panel systems

In the load-bearing area

1/4-20 x 4 Elco Bi-Flex / Hex Washer Head / 18-8 Stainless / Stalgard / QTY 500 10X4 Phillips Bugle Head CoarseBi Flex structural screws are bi metal self drilling tapping screws that provide the corrosion resistance of 300 series stainless steel and the efficiency of drill screws. Bi Flex screws are suitable for use in both steel and aluminum. Features & Specs High strength, ductility and reliability Higher corrosion resistance compared with carbon steel and 410 series stainless steel fasteners 18 8 stainless compatible with pressure treated lumber Immune to