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Strong-Drive® SDCF TIMBER-CF Screw

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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 0.394″-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 and excellent withdrawal resistance. For interior and dry applications only.

Key Features

  • 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
  • Type-17 point for fast starts
  • 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 4 3/4″, 5 1/2″, 6 1/4″, 7″, 8 5/8″, 10 1/4″, 11 3/4″, 13 3/4″, 19 5/8″ and 23 5/8″ lengths


  • Beam reinforcement, wall-to-wall, floor-to-floor, support beams, butt joints
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