1/4-20 x 3-3/8 Elco Dril-Flex / Hex Washer Head / Steel / Stalgard / QTY 500 An installation tool is also

An installation tool is also available to punch a hole through the metal deck for ease of installation

Curtain walls

Aluminum-to-aluminum connections

Window Walls/Glazing

block and brick

1/4-20 x 3-3/8 Elco Dril-Flex / Hex Washer Head / Steel / Stalgard / QTY 500 An installation tool is alsoDril Flex Structural Screws are dual heat treated self drilling tapping screws that provide the strength, ductility and resistance to embrittlement required for critical applications. Features & Specs High hardness point and lead threads for drilling and tapping Stalgard and Stalgard SUB Coatings provide improved corrosion resistance as well as enhanced galvanic compatibility in dissimilar metal applications, including those involving aluminum,