The Simpson Strong-Drive SDWC Truss Screw is a high-strength structural wood screw engineered to deliver a time-saving and reliable solution for fastening trusses and rafters to wall top plates. Designed with a shorter thread length, this structural fastener is purpose-built to accommodate multi-ply members - including plated trusses, engineered-lumber products, and solid-sawn lumber. The fully-threaded shank engages the entire length of the fastener, providing a secure, load-bearing connection between roof and wall framing members. Finished in a durable black E-coat electrocoating, this 0.155 in. diameter x 4 1/2 in. length screw comes packaged with a matched-tolerance T30 6-Lobe driver bit and a metal installation guide tool, giving crews everything needed to fasten truss-to-plate connections efficiently and correctly.

Key Features

• Cap-style head countersinks fully into the double top plate - eliminates interference with drywall or finish trades, keeping the work surface flush and project timelines on track.
• Wide tolerance on installation angle - reduces the risk of improper fastening, making correct installation straightforward even for less experienced crews.
• Can be installed from inside the structure - eliminates the need for exterior work on upper stories, improving job-site safety and cutting time spent repositioning on elevated surfaces.
• Fastening can be performed before or after exterior sheathing is applied - gives crews flexibility to sequence work to fit their schedule without compromising the structural connection.
• Type-17 point - bores into wood faster at startup and drives more easily, reducing the effort and time required per fastener.
• Matched-tolerance T30 6-Lobe driver bit included - engages the fastener head securely to allow one-handed driving, speeding up installation and reducing fatigue on multi-connection jobs.
• E-coat electrocoating finish in black - provides a durable protective coating that helps the fastener withstand the demands of structural framing environments.
• Fully-threaded shank design - maximizes thread engagement across the full fastener length for a secure, load-bearing connection between roof and wall framing members.

Why This Product

• A purpose-built truss fastener that saves time on the roof - the SDWC Truss Screw is specifically designed for truss-to-plate and rafter-to-plate connections, with features like inside-structure installation and pre- or post-sheathing flexibility that reduce exterior staging time and keep crews working efficiently.
• Everything needed is included in one kit - each package ships with the screws, a matched-tolerance driver bit for secure one-handed driving, and a metal installation guide tool, so crews can get to work without sourcing additional accessories.
• Engineered for multi-ply and engineered lumber applications - the shorter thread length and fully-threaded shank are designed specifically to handle plated trusses, engineered-lumber products, and solid-sawn lumber, making this screw a versatile choice across common structural framing scenarios.
• Designed to stay out of the way of finish work - the cap-style head countersinks fully into the double top plate, so the fastener never creates a conflict for drywall installers or finish trades working behind the framing crew.

Specifications

• Model Number (MPN): SDWC15450-KT
• Shank Diameter: 0.155 in.
• Length: 4-1/2 in.
• Thread Length: 4-1/4 in.
• Head Type: Cap Head
• Head Diameter: 0.335 in.
• Drive Type: T30 6-Lobe
• Point Type: Type-17
• TPI (Threads Per Inch): 7
• Coating / Finish: E-Coat Electrocoating
• Color: Black
• Package Quantity: 50

Approved Applications

• Fastening Truss/Rafter-to-Plate connections
• Multi-ply member connections including plated trusses
• Engineered-lumber product fastening
• Solid-sawn lumber structural connections

What's Included

• (50) Strong-Drive SDWC screws
• (1) Matched-tolerance driver bit - Part No. BIT30T-2-R2 (also sold separately)
• (1) Metal installation guide tool - SDWC-GUIDE