DEWALT's 1/4-#14 x 2 in. Bi-Flex® Hex-Washer-Head Coarse-Thread Self-Drill Stalgard-Coated Structural Screws are coated with Stalgard®, offering corrosion resistance for both interior and exterior applications. These screws are suitable for fastening light-gauge steel, metal panels, HVAC components, and other structural assemblies. Coarse threads provide aggressive engagement, minimizing material splitting and stripping while supporting efficient, professional-grade installation.
- Stalgard® GB coating provides improved corrosion resistance as well as enhanced galvanic compatibility in dissimilar metal applications, including those involving aluminum, compared with bare stainless fasteners and those with standard zinc plating
- Provides the corrosion resistance of 300 series stainless steel and the efficiency of drill screws
- Ideal for use with curtain walls, window walls/glazing, rainscreens, solar panel systems, architectural railings, standing seam roof clips, and more
- Immune to hydrogen assisted stress corrosion cracking (HASCC)
- Suitable for use in both steel and aluminum
Login / Signup 
Full Description & Specs