Simpson Strong-Tie .230" X 10-1/4" Strong-Drive SDCF Timber-CF Screws, Flat Head w/Nibs, Six Lobe, Zinc Yellow (50/Pkg) #SDCF221014-R50

The Strong-Drive SDCF Timber-CF screw is a structural fastener available in a variety of lengths and is designed for cross-laminated timber (CLT), 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 unique point, provides fast starts with no predrilling and excellent withdrawal and shear resistance. For interior and dry applications only.

• 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 (replacement bit: BIT50T-134 for 23 5/8" length; BIT40T-134 for all others)
• Available in 0.315” x 4 3/4", 5 1/2", 6 1/4", 7", 8 5/8", 10 1/4", 11 3/4", 13 3/4";  0.390” x 4", 5 1/2", 6 1/4", 7 7/8", 8 5/8", 9 1/2", 11", 19 5/8", 23 5/8" 

• Beam reinforcement, wall-to-wall, floor-to-floor, support beams, butt joints, bearing reinforcement, splitting reinforcement with Simpson Strong-Tie connectors.