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  • 3/8” lag screw replacement

  • No pre-drilling

  • Flat head provides great finished look

  • The SpiderDrive™ System contains eight points of contact, maximizing bit fit and reducing stripping.

  • Sharp gimlet point for fast installation into wood and OSB

  • Aggressive thread for holding and withdrawal strength

  • Free SpiderDrive™ bit in every package


FastenMaster HeadLOK Structural Wood Screws

The HeadLOK flat head fastener is a heavy-duty structural wood screw requires no pre-drilling and offers higher design shear than 3/8" lag screws. HeadLOK zips right in and creates a great finished look.


  • Deck Framing

  • Stair Framing

  • Attaching Rigid Foam (SIPs)

  • Fences

  • Cabinets

  • And so much more!

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