The Simpson Strong-Drive SDWC Truss Screw is a high-strength structural wood screw engineered specifically for fastening trusses and rafters to wall top plates. Designed with a shorter thread length to handle multi-ply assemblies - including plated trusses, engineered-lumber products, and solid-sawn lumber - this screw features a fully-threaded shank that engages the entire fastener length to deliver a secure, dependable connection between roof and wall framing members. This 50-count kit includes a matched-tolerance T30 driver bit and a metal installation guide tool, giving crews a complete, ready-to-use solution for accurate structural fastening from the first screw to the last.

Key Features

• Cap-style head countersinks fully into the double top plate - eliminates interference with drywall or finish trades, keeping the project timeline on track after framing is complete.
• Wide installation angle tolerance - makes it easier to drive the screw correctly in the field, reducing mistakes and rework on the job site.
• Interior installation capability - the screw can be driven from inside the structure, eliminating exterior upper-story work and improving crew safety on multi-story projects.
• Flexible fastening sequence - can be installed before or after exterior sheathing is applied, giving crews the freedom to adapt to their workflow without compromising the connection.
• Type-17 point - cuts into wood faster and drives easier than a standard point, reducing driving time and bit wear on the job.
• Orange color coding - allows for quick visual inspection of installed fasteners, helping supervisors and inspectors confirm coverage at a glance.
• Matched-tolerance T30 driver bit included - engages the fastener head securely for confident one-handed driving, and can be replaced separately using part no. BIT30T-2-R2.
• Metal installation guide tool included - helps ensure consistent, properly positioned fastening on every connection without the need for additional setup tools.

Why This Product

• A complete kit built for structural truss and rafter connections - the 50 screws, driver bit, and metal installation guide tool are all included together, so crews can start fastening trusses and rafters to wall top plates immediately without sourcing additional accessories.
• Engineered for multi-ply framing assemblies - the shorter thread length and fully-threaded shank are specifically designed to perform in plated trusses, engineered-lumber products, and solid-sawn lumber, making this screw a purpose-built fastener rather than a general-purpose substitute.
• Designed to keep crews safer and more productive - the ability to install from inside the structure removes the need for exterior upper-story work, and the one-handed driving capability with the included matched-tolerance bit speeds up installation across a full top plate run.
• Built-in inspection confidence - the distinctive orange color makes it straightforward to visually verify that every fastener is in place, supporting quality control and field inspection without additional documentation steps.

Specifications

• Model / MPN: SDWC15600-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
• Threads Per Inch (TPI): 7
• Point Type: Type-17
• Coating / Finish: Clear Zinc Coating
• Color: Orange
• Quantity per Package: 50

Approved Applications

• Fastening Truss/Rafter-to-Plate connections
• Fastening plated trusses to wall top plates
• Fastening engineered-lumber products to framing members
• Fastening solid-sawn lumber in multi-ply assemblies

What's Included

• 50 Strong-Drive SDWC15600 Structural Screws
• 1 Matched-tolerance T30 driver bit (Part No. BIT30T-2-R2; also sold separately)
• 1 Metal installation guide tool - SDWC-GUIDE (for SDWC

Frequently Asked Questions

What is included in this kit beyond the screws themselves?

This kit includes 50 Strong-Drive SDWC screws, one matched-tolerance driver bit (part no. BIT30T-2-R2, also sold separately), and one metal installation guide tool - SDWC-GUIDE (also sold separately) - giving crews everything needed for accurate, one-handed driving right out of the box.

What drive type and bit size does the SDWC TRUSS screw require?

The screw uses a T30 6-Lobe drive. The kit includes a matched-tolerance driver bit (part no. BIT30T-2-R2) that engages the fastener head securely to allow one-handed driving. Replacement bits are available separately under that same part number.

What types of lumber or framing assemblies is this screw designed for?

The SDWC TRUSS screw is designed specifically for fastening trusses and rafters to wall top plates. Its shorter thread length makes it well suited for multi-ply assemblies including plated trusses, engineered-lumber products, and solid-sawn lumber.

Does the sheathing need to be applied before installing these screws?

No. Fastening can be performed either before or after exterior sheathing is applied, offering added flexibility in scheduling. Additionally, the screws can be installed from inside the structure, eliminating the need for exterior work on upper stories and improving job site safety.