1/2" x 3-1/2" Pin-Drive Expansion Anchor, Yellow Zinc Plated, Pkg 25 Paper Tape Framing Nails 5-inch lally columns and Triple

5-inch lally columns and Triple 2x10/12 girders but is also available in a wide range of other sizes

Each screw features a 1/4" hex head with an integrated washer stamped for easy post-installation inspection

and each package includes a driver bit for convenience

Bridges & Boardwalks: Essential for supporting heavy timber construction projects

1/2" x 3-1/2" Pin-Drive Expansion Anchor, Yellow Zinc Plated, Pkg 25 Paper Tape Framing Nails 5-inch lally columns and TripleSimpson pin drive expansion anchors are coated in yellow zinc dichromate and used for medium and heavy duty fastening applications into concrete and grout filled block. California Residents: WARNING