The Simpson Strong-Drive SDWC TRUSS Structural Screw (Model SDWC15600B-KT) is a high-strength structural wood screw engineered to deliver a time-saving, reliable method for fastening trusses and rafters to wall top plates. Measuring 0.155 in. in diameter x 6 in. in length, this screw features a fully-threaded shank that engages the entire fastener length, creating a secure, code-ready connection between roof and wall framing members. Its shorter thread length is specifically designed for multi-ply assemblies, including plated trusses, engineered-lumber products, and solid-sawn lumber. The distinctive orange color provides immediate visual confirmation during inspection, and every kit ships with matched-tolerance driver bits and metal installation guide tools so your crew can start driving from the moment the box is opened. Sold in a 500-count box.

Key Features

• Cap-Style Head Countersinks Fully - The cap-style head seats completely into the double top plate, eliminating interference with drywall or finish trades.
• Wide Angle Tolerance - Broad installation angle tolerance makes it easy to drive the SDWC correctly the first time, even in tight framing conditions.
• Interior Installation - Can be installed from inside the structure, eliminating exterior work on upper stories and significantly enhancing job-site safety.
• Flexible Sequencing - Fastening can be performed before or after exterior sheathing is applied, giving crews added scheduling flexibility.
• Type-17 Point - Self-tapping Type-17 point bores into wood faster and drives easier, reducing bit cam-out and splitting.
• Orange Color for Easy Inspection - The bright orange finish allows fast visual verification that every fastener has been properly installed.
• Fully-Threaded Shank - Thread engagement along the entire fastener length maximizes withdrawal resistance and connection integrity.
• T30 6-Lobe Drive - The Torx-style T30 6-lobe recess pairs with the included matched-tolerance driver bit for confident, one-handed driving.
• Matched-Tolerance Driver Bit Included - Engages the fastener head securely for one-handed driving; replacement bit part no. BIT30T-2-R2 (also sold separately).
• Metal Installation Guide Tool Included - Helps ensure proper installation angle every time (SDWC-GUIDE, for SDWC15600 only; also sold separately).
• Clear Zinc Coating - Provides corrosion resistance suited to interior framing applications.

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
• Country of Origin: Taiwan

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.