The Big Timber CTX #15 construction lag screws are heat-treated hardened steel for high tensile and high shear strength with triple layer ACQ compatible bronze coating.

The deep six-lobe star drive recess reduces cam-out end load while the built-in washer head offers increased pull through strength.

Use when fastening into wood roof support structure (rafters/trusses).

• Need 3 screws per each Drift Corrugated I or II bracket
• Need 4 screws per each Drift II or III bracket.
• Need 5 screws per each Drift Solar bracket.