Introducing the FastenMaster LedgerLOK FMLL358B-250 LedgerLOK 3-5/8" – a breakthrough in deck construction that redefines how you fasten a ledger board to a rim joist. This is the first wood screw engineered to attach a ledger-to-rim-board without any predrilling, delivering a faster, cleaner, and code-compliant connection from the ground up. The built-in washer head eliminates the need for a separate washer, saving time, reducing hardware clutter, and lowering overall project costs. A large hex-head ensures maximum bit engagement and dramatically reduces cam-out, so you can drive each screw with confidence, even on busy job sites.

What makes LedgerLOK a standout choice is its practical, on-site efficiency. It replaces traditional 1/2" lag bolts, installing in a fraction of the time while delivering a secure, long-lasting ledger-to-rim-board connection. Designed for longevity, LedgerLOK is guaranteed to last for the life of the project, giving you peace of mind on every deck you build or retrofit. Each 250-piece bucket includes 3-5/8" ledger board screws and a hex driver bit, plus the technical bulletin to tailor the fastening pattern to your specific application. Since 2003, thousands of pros have trusted LedgerLOK for reliable, easy ledger-to-rim board connections on jobsites everywhere.

Why builders choose LedgerLOK

• No predrilling required for ledger-to-rim connections, speeding up installation and reducing site labor.
• Built-in washer head eliminates extra hardware and simplifies assembly, saving time and materials.
• Large hex-head provides greater bit engagement and minimizes cam-out under load.
• 3-5/8" length is optimized for standard deck ledger installations, ensuring a solid bite without overdriving.
• 250 screws per bucket with a single hex driver bit included for immediate use on the job.
• Code-compliant connection that aligns with typical deck and rim board requirements, helping you pass inspections with confidence.
• Lifetime durability guaranteed for the life of the project, so you won’t be backtracking on this critical connection.

Ideal for

Professional deck builders, remodel specialists, and ambitious DIYers who want a dependable ledger-to-rim board solution that reduces steps, material counts, and installation time. This is the go-to choice when building a new deck or upgrading an existing ledger connection where speed and reliability matter most.

Practical guidance and use cases

• Use LedgerLOK when attaching a ledger board to a rim joist on new construction or major retrofit projects. Refer to the included LedgerLOK technical bulletin to determine the exact fastening pattern for your application.
• Prefer LedgerLOK for projects where predrilling is impractical due to tight framing or crowded joist configurations. The no-pred drilling design helps you work quickly without compromising strength.
• Leverage the all-in-one package (screws and hex driver bit) to standardize your deck builds and reduce chasing down hardware on site.

With LedgerLOK, you’re choosing a time-tested, field-proven solution that translates to faster builds, fewer labor steps, and rock-solid ledger connections. It’s not just a fastener; it’s a smarter way to secure your deck from the ground up.