Simpson Strong-Tie #14 x 1" Self-Drilling TB Wood-To-Steel Screw, Square Flat Head - Yellow Zinc, Collated, Qty. 1,000 Flat Head Structural Screws 1-hr and 2-hr fire resistance

1-hr and 2-hr fire resistance ratings per ASTM E119 (see L-C-CBHCHAR)

Flexible design: #3 Roofjack size fits pipe sizes from 1/4" - 5"

infrastructure

Available in multiple sizes to fit common post dimensions

it’s the go-to fastener for decks

Simpson Strong-Tie #14 x 1" Self-Drilling TB Wood-To-Steel Screw, Square Flat Head - Yellow Zinc, Collated, Qty. 1,000 Flat Head Structural Screws 1-hr and 2-hr fire resistanceThe Simpson Strong Tie Strong Drive TB1440S TB Wood to Steel Screw is specifically engineered for fastening wood members to steel framing without the need for predrilling. Featuring a drill point tip and optimized thread design, this screw offers fast starts, strong holding power, and consistent performance for structural connections. The collated format makes it compatible with auto feed screw driving systems, improving installation speed and