Dewalt 1/4" - 20 x 1" Bi-Flex Hex Washer Head Screws (Box of 2500)

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. Bi-Flex screws are suitable for use in both steel and aluminum. Features: High strength, ductility and reliabliity Immune to hydrogen assisted stress corrosion cracking (HASCC) Higher corrosion resistance compared with carbon steel and 410 series stainless steel fasteners Stalgard GB coating creates greater galvanic compatibility in dissimilar metal applications, including connections involving aluminum 18-8 stainless compatible with pressure treated lumber