#12 x 2 Elco Bi-Flex / Hex Washer Head / 18-8 Stainless / Stalgard / QTY 1500 8X1 1/2 Phillips Modified Truss

8X1 1/2 Phillips Modified Truss Head Fine Thread Drywall Screw Fully Threaded Zinc

meaning it grabs the flats of the screw and not the corners

DeWALT SKU-DFM3EML300-The Aggre-Gator anchor is a Bi-Metal 300 series stainless screw anchor for light to medium duty applications in concrete and masonry block base materials

DeWALT SKU-DFM4EMF470-The Crete-Flex anchor is a 410 stainless steel screw anchor for light to medium duty applications in concrete and masonry block base materials

E-Form® thread profile overcomes friction build-up and reduces drive torque

#12 x 2 Elco Bi-Flex / Hex Washer Head / 18-8 Stainless / Stalgard / QTY 1500 8X1 1/2 Phillips Modified TrussBi 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