LedgerLok Ledger Board Fastener

LedgerLok Ledger Hex Head Board Fastener

What Is the LedgerLOK

These are structural wood screws specifically engineered to fasten a deck ledger board (the horizontal board that attaches the deck to the house) to a rim joist in a way that meets building-code requirements.

Key Features & Specifications

1. No Pre-Drilling Required

   • According to FastenMaster, the LedgerLOK can be installed without pre-drilling.
     

   • This saves a lot of time versus traditional ½″ lag screws or bolts.
     

2. Corrosion Resistance

   • The screws use a proprietary 3-step coating (galvanized + polymer) that outperforms many standard coatings.
     

   • Rated for ACQ-treated lumber, meaning it's safe for pressure-treated wood.
     

3. Drive & Head Style Options

   • Head style:

     • Hex Washer Head — has a built-in washer, improves bit engagement, reduces cam-out.
       

   • Length options: 3-5/8″ and 5″ for different ledger / rim joist thickness configurations.
     

4. Structural / Code Compliance

   • Designed specifically for deck ledger-to-rim-joist connections.
     

   • Meets ICC-ES code evaluation (ESR-1078) for deck ledger connection when installed per their installation guide.
     

   • FastenMaster claims the shear strength is stronger than a ½″ lag screw.
     

5. Installation Guidance

   • Use a high-torque drill (they recommend a ½″ variable-speed drill, 18 V if cordless) to drive the screws.
     

   • For proper load transfer, they recommend that the threads fully engage into the rim joist, and the tip of the screw should protrude past the inside face of the rim joist.
     

   • Proper spacing is important — there is a pattern / table in their tech bulletin for where screws should be placed.
     

6. Durability

   • The coating is “tested under current ICC standard” for use in treated lumber to provide long-term corrosion protection.
     

   • FastenMaster’s structural fasteners (including LedgerLOK) come with a “ProjectLife™ Guarantee” (they guarantee their structural fasteners for the life of the project).
     

7. Limitations

   • Not for Use on Masonry / Concrete: According to their installation guide, LedgerLOK is not designed for attachment to masonry, stucco, or brick veneer.
     

   • Tool Required: Because no pre-drill is needed, you still need a strong drill / driver to drive the screws properly without damaging the head.

   • Edge / Spacing Considerations: Must follow the minimum spacing and edge-distance guidelines in the technical bulletin.
     

Why Use LedgerLOK (Pros)

• Speed & Efficiency: Saves a ton of labor time compared to lag screws or through-bolts, especially if you skip pre-drilling.
• Strong & Safe Connection: Designed for structural loads on a deck ledger, so it’s more reliable / code-friendly than using random screws.
• Durable in Treated Wood: Because it's designed for ACQ-treated lumber, it's very suitable for many deck builds where the ledger is pressure-treated.
• Cleaner Finish: The flat head version can sit flush with the ledger, which is nice if you’re trying to minimize protruding fasteners.
• Reduced Risk of Stripping: With the hex head version, bit engagement is stronger, reducing the chance of stripping out during installation.

About this product...

LedgerLOK is a code approved deck ledger board fastener that replaces lag screws and through-bolts.

DETAILS: