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Strong-Drive® SDCFC TIMBER-CFC Screw 

The Strong-Drive SDCFC Timber-CFC screw (CFC — Countersunk, Fully Threaded, Cylinder Head) — a robust structural fastener available in a variety of long sizes (500 mm – 1,000 mm) — is designed for cross-laminated timber (CLT) construction, mass timber construction and general interior applications. These sturdy 0.390"-diameter structural fasteners provide extra strength for demanding applications requiring large-sized structural members. The compact cylinder head provides clean countersinking with a reduced footprint. The yellow zinc, fully-threaded screw, with a proprietary point, provides fast starts and excellent withdrawal resistance. For interior and dry applications only.

Key Features

  • Interior grade yellow-zinc coating
  • Compact cylinder head helps countersink the screw for an unobstructed finish
  • Heavy-duty, fully-threaded 0.390" (10 mm) outer diameter provides strength, with superb withdrawal resistance
  • Deep 6-lobe recess for a secure drive (replacement bit: BIT50T-2-R1)
  • Available in 500 mm (19 5/8"), 600 mm (23 5/8"), 800 mm (31 1/2"), and 1,000 mm (39 3/8") lengths


Beam reinforcement, wall to wall, floor to floor, support beams, butt joints, and splitting reinforcement

Related Literature

Product Information Table

Fastener Production Information and Stuff & Things
New products
Model No. Coating/Material Length (in.) Head Diameter (in.) Shank Diameter (in.) Drive Type Head Type Thread Length (in.) Packaging Qty.
SDCFC271958 Yellow-Zinc Coated 19 5/8 0.525 0.290 T50 6-Lobe Cylinder Head 18 3/8 50
SDCFC272358 Yellow-Zinc Coated 23 5/8 0.525 0.290 T50 6-Lobe Cylinder Head 22 1/4 50
SDCFC273112 Yellow-Zinc Coated 31 1/2 0.525 0.290 T50 6-Lobe Cylinder Head 30 1/8 50
SDCFC273938 Yellow-Zinc Coated 39 3/8 0.525 0.290 T50 6-Lobe Cylinder Head 38 50

Code Reports & Compliance