Simpson Strong-Tie 0.230" x 13-3/4" Strong-Drive SDCF Timber-CF Screw - Yellow Zinc | Qty. 50 CB Column Bases 5-inch lally columns and 5

5-inch lally columns and 5

Inverted upper threads clear material away for flush seating

lighter version that installs with fewer screws

these screws are ideal for everything from basement framing to custom shelving or large furniture builds

these screws are engineered to perform in real-world outdoor conditions

Simpson Strong-Tie 0.230" x 13-3/4" Strong-Drive SDCF Timber-CF Screw - Yellow Zinc | Qty. 50 CB Column Bases 5-inch lally columns and 5The Simpson Strong Tie Strong Drive SDCF Timber CF Screw is engineered for strength and reliability in cross laminated timber (CLT), mass timber, and other demanding wood construction applications. Available in multiple lengths and diameters, these fully threaded structural fasteners deliver exceptional withdrawal resistance and holding power, making them the trusted choice for large scale wood assemblies. Each screw features a flat head with