The Simpson Strong-Drive SDW Truss-Ply 0.220 x 4-3/8" Wood Screw with E-coat Electrocoating is a high-strength structural fastener engineered specifically for joining multi-ply wood members such as plated trusses and solid-sawn lumber. Featuring a SawTooth point that cuts through wood fibers cleanly, this screw drives without predrilling - saving time and labor on demanding framing and truss assembly projects. The durable E-coat Electrocoating finish provides corrosion resistance suited for interior structural applications, making it a reliable choice wherever strong, permanent wood-to-wood connections are required.

Key Features

• SawTooth Point - cuts into wood fiber aggressively for fast, self-starting installation with no predrilling required, reducing setup time on the job
• T40 6-Lobe Drive Type - provides superior bit engagement and reduces cam-out under high torque, giving installers better control and a cleaner drive
• Low Profile Head (0.760 in. diameter) - sits flush or near-flush against the wood surface, minimizing interference with adjoining members in tight multi-ply assemblies
• 0.220 in. shank diameter - heavy-gauge shank delivers the shear strength needed to hold structural multi-ply connections securely under load
• 4-3/8 in. total length with 1-3/8 in. thread length - thread is positioned to engage the receiving member firmly while the smooth shank bridges the joint, pulling plies tightly together
• E-coat Electrocoating finish - provides a uniform, corrosion-resistant coating over the entire fastener surface, extending service life in interior structural environments
• Single-side installation design - multi-ply trusses and built-up lumber components can be fastened from one side only, eliminating the need to lift, flip, or reposition heavy assemblies

Why This Product

• Designed specifically for multi-ply truss and structural lumber connections - where a standard wood screw or nail would lack the shank diameter and thread engagement needed to meet structural demands
• The SawTooth point and T40 6-Lobe drive work together to eliminate predrilling, making installation faster and reducing tool requirements on the job site
• One-sided fastening capability means heavy built-up assemblies stay in place during installation - no flipping, no repositioning, and no added crew members needed just to turn a member over
• The low profile head and precise 4-3/8 in. length are engineered for truss-ply geometry, so the fastener performs its structural role without protruding or interfering with connector plates and adjoining components

Specifications

• Brand: Simpson Strong-Tie
• Shank Diameter (in.): 0.220
• Length (in.): 4 3/8
• Head Diameter (in.): 0.760
• Thread Length (in.): 1 3/8
• Head Type: Low Profile Head
• Drive Type: T40 6-Lobe
• Point Type: SawTooth Point
• Coating: E-coat Electrocoating
• Finish: E-coat Electrocoating
• Country of Origin: Taiwan

Available Pack Options

• SDW22438-R50: 50 Pk - includes one 6-lobe, T40 driver bit
• SDW22438MB: 200 Pk - includes one 6-lobe, T-40 driver bit
• SDW22438: 600 Pk - includes two 6-lobe, T-40 driver bits

Frequently Asked Questions

Does this screw require predrilling before installation?

No. The SawTooth point is designed to start and drive into wood without any predrilling, which speeds up installation and reduces the tools needed on site.

What drive bit does this screw require?

This screw uses a T40 6-Lobe drive, which requires a T40 Torx-style bit. The 6-lobe interface provides a secure connection between bit and fastener, reducing cam-out under the high torque needed for structural installation.

Can this screw be installed from only one side of the assembly?

Yes. The Strong-Drive SDW Truss-Ply screw is specifically designed for single-side installation, meaning both plies of a multi-ply truss or built-up member can be fastened without flipping or repositioning the assembly.

What type of coating does this screw have, and where is it intended to be used?

This screw features an E-coat Electrocoating finish, which applies a uniform corrosion-resistant layer over the entire fastener surface. It is intended for interior structural wood applications such as multi-ply truss assemblies and solid-sawn lumber connections.