FastenMaster FlatLOK Technical Bulletin

The FlatLOK Structural Wood Screw is designed specifically for joining multiple plies of dimensional lumber and engineered wood for headers, girders, and beams. When installed as instructed in this bulletin, these fasteners can be used to replace nailing and bolting patterns prescribed by code, specified by the engineer, or recommended by the engineered lumber manufacturer.

The FastenMaster FlatLOK Technical Bulletin includes:

  • Load Type
  • Spacing Requirements
  • Installation Instructions
  • Fastening Patterns for Engineered Lumber
  • Fastening Patterns for Dimensional Lumber


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