The Simpson Strong-Drive SDWC Truss Screw is a high-strength structural wood screw engineered to deliver a time-saving and reliable method for fastening trusses and rafters to wall top plates. Its fully-threaded shank engages the entire length of the fastener, creating a secure connection between roof and wall framing members, while a shorter thread length makes it well-suited for multi-ply assemblies including plated trusses, engineered-lumber products, and solid-sawn lumber. The distinctive orange color enables quick visual confirmation during inspection, and this kit ships complete with matched-tolerance driver bits and metal installation guide tools so crews can begin driving immediately.

Key Features

• Cap-style head countersinks fully into the double top plate - sits flush below the surface to avoid interference with drywall or finish trades, keeping the project on schedule.
• Wide tolerance on installation angle - reduces the chance of mis-driven fasteners, helping crews work faster and more confidently on every connection.
• Interior installation capability - the screw can be driven from inside the structure, eliminating exterior work on upper stories and improving job-site safety for elevated applications.
• Flexible installation sequencing - fastening can be performed before or after exterior sheathing is applied, allowing crews to adapt to changing site conditions without rework.
• Type-17 point - promotes faster starts and easier driving compared to standard points, reducing driver strain and speeding up repetitive fastening tasks.
• Orange color coding - provides immediate visual confirmation of correct fastener placement during framing inspections, saving time on walk-throughs.
• Matched-tolerance T30 driver bit included - engages the fastener head securely for one-handed driving, minimizing cam-out and keeping productivity high (replacement bit part no. BIT30T-2-R2).
• Metal installation guide tools included - help ensure proper installation angle every time, reducing guesswork and supporting consistent, code-ready connections across the entire framing crew.

Why This Product

• A complete, job-ready kit - with 500 screws, two driver bits, and two metal installation guide tools included in the box, crews have every component needed to start fastening trusses and rafters to top plates without sourcing accessories separately.
• Engineered specifically for truss-to-plate connections - the shorter thread length and fully-threaded shank are purpose-built for multi-ply assemblies such as plated trusses and engineered-lumber products, delivering a structural connection designed for the application rather than adapted from a general-purpose fastener.
• Designed to keep interior trades moving - the cap-style head countersinks flush into the double top plate and installation can be completed from inside the structure, so the fastening process does not create conflicts with drywall, sheathing, or finish work that follows.
• Built-in flexibility reduces costly scheduling constraints - because fastening can be performed before or after exterior sheathing is applied, framing crews are not locked into a rigid sequence, helping projects stay on track even when conditions change.

Specifications

• Model Number: SDWC15600B-KT
• Shank Diameter: 0.155 in.
• Length: 6 in.
• Thread Length: 5 3/4 in.
• Head Type: Cap Head
• Head Diameter: 0.335 in.
• Drive Type: T30 6-Lobe
• Point Type: Type-17 Point
• Coating: Clear Zinc Coating
• Color: Orange
• Quantity: 500

Approved Applications

• Fastening trusses and rafters to wall top plates

Frequently Asked Questions

What materials and assemblies is the SDWC TRUSS screw designed to fasten?

The SDWC TRUSS screw is engineered for fastening trusses and rafters to wall top plates, with a shorter thread length specifically suited for multi-ply assemblies including plated trusses, engineered-lumber products, and solid-sawn lumber. Its fully-threaded shank engages the entire fastener length to create a secure connection between roof and wall framing members.

What is included in this 500-count kit?

The kit includes 500 Strong-Drive SDWC screws, 2 matched-tolerance T30 driver bits (part no. BIT30T-2-R2, also sold separately), and 2 metal installation guide tools - SDWC-GUIDE (for SDWC15600 only; also sold separately) - so crews can begin installation immediately upon opening the box.

Can the SDWC TRUSS screw be installed from inside the structure, and does sheathing need to be in place first?

Yes. The screw can be installed from inside the structure, eliminating the need for exterior work on upper stories and enhancing job-site safety. Additionally, fastening can be performed either before or after exterior sheathing is applied, giving crews added scheduling flexibility.

What are the key dimensional and drive specifications for this screw?

The screw has a shank diameter of 0.155 in., an overall length of 6 in., and a thread length of 53/4 in. The cap-style head measures 0.335 in. in diameter and is driven with a T30 6-Lobe drive. The Type-17 point enables faster starts and easier driving, and the orange clear-zinc coating allows easy visual inspection after installation.