3/8-16 x 4 1/2 MACHINE SCREWS / Slotted / Round Head / 18-8 Stainless / Plain Bi-Flex structural screws are bi-metal

Bi-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

Plastic ring creates countersunk recess to keep threads clean from pour residue

Pull-out testing conducted in accordance with AISI S905 using the alternate tension test (with adjustments to allow for large fastener diameters)

8X5/8 Phillips Bugle Head Coarse Thread Drywall Screw Black Phosphate Particle Board

DeWALT flat phillips blue concrete screw

3/8-16 x 4 1/2 MACHINE SCREWS / Slotted / Round Head / 18-8 Stainless / Plain Bi-Flex structural screws are bi-metal