Simpson Strong-Tie 0.470" x 13-3/4" SDCF Timber-CF Flat Head Screw - E-Coat, Black, Qty. 25 Zinc Large Diameter Masonry Screws Aluminum is a reliable choice

Aluminum is a reliable choice for outside structures and may be able to last in the elements for a few years

fire-rated connections in multifamily and multilevel Type III residential constructions

Lumber Size: Intended for use with 3-1/4x beams

Precise depth adjustment prevents over and under driving

Each unit is drop-forged from high tensile steel and hot-dip galvanized for exceptional corrosion resistance

Simpson Strong-Tie 0.470" x 13-3/4" SDCF Timber-CF Flat Head Screw - E-Coat, Black, Qty. 25 Zinc Large Diameter Masonry Screws Aluminum is a reliable choiceThe Simpson Strong Tie SDCF12X350 R25 SDCF TIMBER CF screw by Simpson Strong Tie is built to meet the structural demands of mass timber construction, including cross laminated timber (CLT), glulam, and laminated veneer lumber (LVL). This fully threaded structural screw provides high strength connections for demanding wood to wood applications, no pre drilling required in most conditions. Key Features: Fully Threaded Design: Ensures even load