Dewalt 1/4" - 14 x 1-1/2" Dril-Flex Hex Washer Head Screws (Box of 2000)

Dril-Flex Structural Drill Screws are dual heat treated self-drilling tapping screws that provide the strength, ductility and resistance to embrittlement required for critical applications. Features: High-hardness point and lead threads for drilling and tapping Lower-hardness load bearing area provides increased resistance to Hydrogen-Assisted Stress Corrosion Cracking when compared to case hardened fasteners Stalgard and Stalgard SUB Coatings provide enhanced galvanic compatibility in dissimilar metal applications Fasteners coated with Stalgard SUB finish typically show no red rust or other base metal corrosion on significant surfaces after 2000 hours of 5% neutral salt spray exposure (per ASTM B117) Fasteners coated with Stalgard finish typically show no red rust or other base metal corrosion on significant surfaces after 1000 hours of 5% neutral salt spray exposure (per ASTM B117)