Simpson Strong-Tie Strong-Drive SDCF TIMBER-CF Screw

The Strong-Drive SDCF Timber-CF screw is a structural fastener available in a variety of lengths and is designed for cross-laminated timber construction, mass timber construction and general interior applications. These 0.315"- and 0.390"-diameter structural fasteners provide uncompromised strength for these demanding applications. The large flat head with underhead nibs provides for clean countersinking. The yellow zinc, fully-threaded screw with a proprietary point provides fast starts and excellent holding power.

• Designed to be countersunk with head flush to wood surface
• Fully threaded to provide high withdrawal resistance
• Flat head with nibs helps countersink the screw for a flush finish
• Heavy-duty, fully-threaded shank provides strength, with superb withdrawal resistance
• Head stamp includes length in mm for inspection
• Interior grade yellow-zinc coating
• Deep 6-lobe recess for a secure drive (T40 - replacement bit part number BIT40T-134-R2; T50 - replacement bit part number BIT50T-2-R1.)

Specifications (all models)

• Fastener Type: Hand-Drive Screw
• Head Type: Flat Head with Nibs
• Finish: Yellow-Zinc Coated
• Application: Beam Reinforcement / Fastening Wall-to-Wall / Fastening Support Beams / Fastening Butt Joists / Mass Timber / Cross-Laminated Timber

Available options (see each model for exact values)

• Length (in.): 4 3/4 to 23 5/8
• Shank Diameter (in.): 0.230, 0.290
• Head Diameter (in.): 0.590, 0.725
• Drive Type: T40 6-Lobe, T50 6-Lobe
• Thread Length (in.): 4 1/4 to 23 3/8
• Packaging Type: Carton, Box