The Simpson Strong-Drive SDWC TRUSS Screw (Model SDWC15600-KT) delivers a time-saving and reliable fastening solution for securing trusses and rafters to wall top plates. Engineered with a shorter thread length specifically for multi-ply assemblies - including plated trusses, engineered-lumber products, and solid-sawn lumber - this high-strength structural wood screw features a fully-threaded shank that engages the entire length of the fastener. The result is a secure, code-compliant connection between roof and wall framing members. This 50-count kit includes a matched-tolerance driver bit and a metal installation guide tool, giving crews everything needed to drive fasteners accurately and efficiently from inside the structure.

Key Features

• Cap-Style Head Countersinks Fully - The cap-style head countersinks fully into the double top plate to avoid interference with drywall or finish trades.
• Wide Installation Angle Tolerance - Wide tolerance on installation angle makes it easy to install the SDWC correctly, reducing the chance of misdriven fasteners.
• Interior Installation Capability - Can be installed from inside the structure, eliminating exterior work on the upper stories and enhancing job safety.
• Flexible Fastening Sequence - Fastening can be performed before or after exterior sheathing is applied for added flexibility.
• Type-17 Point - Engineered Type-17 point provides faster starts and easier driving through lumber.
• Orange Color-Coded - Orange finish allows for easy visual inspection after installation.
• One-Handed Driving - Included matched-tolerance driver bit engages the fastener head securely to allow one-handed driving.
• Fully-Threaded Shank - The fully-threaded shank engages the entire length of the fastener, maximizing withdrawal resistance and connection strength.
• T30 6-Lobe Drive - The T30 6-Lobe drive provides high torque transfer and reduces cam-out during installation.

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
• Country of Origin: Taiwan

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.