TimberLOK Structural Wood Screw

TimberLOK is a heavy duty wood screw for applications such as attaching rafter or trusses to the top plate, landscape timbers, fences, decks, headers, stair stringers and more.

TimberLOK replaces 3/8" lag screws and is approved for use in ACQ pressure treated lumber. There is no need to predrill with TimberLOK. Its sharp point and aggressive threads zip right in to the densest woods.

  • Unique tapered head countersinks easily into wood for flush appearance
  • Variety of lengths, from 2 1/2" to 10", to match every application
  • Free bit in every package

A 6" TimberLOK is a code-compliant way to attach rafters or trusses to a double top plate. For TimberLOK technical information, see the Technical Docs section below. For technical documentation of all our structural wood screws, see our Technical Resources page.

Click here to request a free TimberLOK Installation Guide.

 

Videos

TimberLOK 6" Rafter Tail or Truss to Top Plate Connection

Learn how the TimberLOK 6" Structural Wood Screw replaces hurricane ties while meeting IRC 2012 national code requirements for rafter or truss to top plate connections.

TimberLOK 6" Installation Guide for Rafter/Truss to Top Plate Applications

Learn how you can install a FastenMaster 6" TimberLOK at the correct angle using our new installation guide.

TimberLOK 6" vs. Hurricane Ties

This comparison video demonstrates time saved using the TimberLOK 6" Structural Wood Screw in place of hurricane ties when connecting rafters or trusses to the top plate.

  • Sku Selections
  • Installation
  • Technical Docs
  • Purchase FM Products
TimberLOK SKU Selection Guide
LENGTH TYPICAL APPLICATIONS PACKAGING QTY SKU
 2 1/2"   Doubling/sistering up 2x header
or carrying beams
  
 12 pc clamshell  FMTLOK212-12
 50 pc box  FMTLOK212-50
 500 pc bucket  FMTLOK212-500
 4"  Attaching 2x to 4x structures -
fencing
 12 pc clamshell  FMTLOK04-12
 50 pc box  FMTLOK04-50
 250 pc bucket  FMTLOK04-250
 6"  

Replacing hurricane ties on rafters
or trusses. Joining multiple 4x
timbers

 12 pc clamshell  FMTLOK06-12
 50 pc box  FMTLOK06-50
 250 pc bucket  FMTLOK06-250
 8" Building up 6x landscape walls   12 pc clamshell  FMTLOK08-12
 50 pc box  FMTLOK08-50
 250 pc bucket  FMTLOK08-250
10"   Post and Beam construction  12 pc clamshell  FMTLOK10-12
 50 pc box   FMTLOK10-50
 250 pc box  FMTLOK10-250

 

TimberLOK should be installed using a high torque, 1⁄2" variable speed drill (18V if cordless). Choose the proper length so that threads fully engage the main member or bottom piece. Bring fastener head flush to wood surface or countersink head flush.

TimberLOK is not recommended for saltwater applications.

ICC-ES Report, ESR 1078

The ICC-ES Evaluation Report demonstrates to the installer and code official that our LOK fasteners comply with the most current building codes. This report also provides the engineer with critical values needed to design safe installations. Reports from ICC-ES are the most recognized reports used by code officials across the U.S. This document can be shared with code officials, engineers, architects and specifiers who may have questions regarding proper use or code compliance of LOK fasteners.

Technical Evaluation Reports (TERs)

TERs qualify for building official approval and are developed from test reports that comply with IBC Section 104.11.1

Technical Bulletins

FastenMaster technical bulletins are abridged versions of our TERs that demonstrate general guidelines and fastening patterns.

Rafter to Top Plate Technical Bulletin

This file contains technical information on how to fasten this application in a code-compliant manner

Rafter to Top Plate Technical Bulletin - Canadian Version

This file contains technical information on how to fasten this application in a code-compliant manner - Canadian version (both English and French)

Truss to Top Plate Technical Bulletin

This file contains technical information on how to fasten this application in a code-compliant manner

Truss to Top Plate Technical Bulletin - Canadian Version

This file contains technical information on how to fasten this application in a code-compliant manner - Canadian version (both English and French)

DWG Drawings

For use in CAD software

Warranty Information

TimberLOK Guarantee of Performance

The file contains information regarding TimberLOK's product guarantee including fastener performance and corrosion resistance

Catalog Pages

Product specific pages from our FastenMaster catalog.

Purchase FastenMaster Products

To find a dealer near you, click below:

Find a Dealer

To order online, visit one of our online partners: