FlatLOK Structural Wood Screw

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FlatLOK Delivers Strong, Code-Compliant Connection for multi-ply lvl, girder trusses and multi-ply lumber beams.

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FlatLOK Structural Wood Screw

Learn how the FlatLOK Flathead Structural Wood Screw replaces nails and through bolts when attaching multi-ply LVL, dimensional beams and girder trusses. 

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FlatLOK is a multi-purpose structural wood screw for fastening multi-ply LVL, girder trusses and multi-ply lumber beams.

Single-Sided Installation

FlatLOK is approved for single-sided installation making the job easier to complete both at ground level or for elevated applications. The flat head allows for easy finishing including drywall or trim.

TORX® ttap® drive system

  • FlatLOK wood screw features a TORX® ttap® drive system that:
  • Maximizes bit fit, reducing the potential for stripping.
  • Includes a stability button for maximum penetration into the fastener and a wobble-free drive.
  • A free TORX ttap bit (T-40) is included in every box.

Length and Applications:

  • 2 7/8”: 2-ply roof girder trusses and 2-ply dimensional wood headers
  • 3 1/2": 2-ply LVL beams
  • 4”: Interior corridor ledgers
  • 4 1/2”: 3-ply roof girder trusses and 3-ply beams
  • 5”: 3-ply LVL beams
  • 6": 4-ply roof girder trusses and 2-ply open web floor trusses
  • 6 3/4": 4-ply LVL beams

Code Compliant Connection

FlatLOK is tested and supported by engineering data that conforms to the most current ICC standards. It is also approved for use in ACQ or treated lumber.

For technical documentation of all our structural wood screws, see our Technical Resources page.