Simpson Strong-Drive DWP Wood Screw - #14 x 4", Flat Head, Type 305 Stainless Steel is a load-rated structural fastener engineered for deck, dock, boardwalk, and general exterior applications where dependable corrosion protection and verified load performance are essential. Built from Type 305 stainless steel with a sharp point and unique box-thread design, this screw drives cleanly into wood, engineered wood, and polymer materials while delivering tested resistance to shear, pull-through, and withdrawal forces - making it a trusted choice for exterior connections exposed to high or severe corrosion environments near water.

Key Features

• Type 305 Stainless Steel material - provides extra corrosion protection for exterior structural applications near water, docks, and decks where standard coatings fall short
• Unique box-thread design with raised-ridge technology - greatly reduces driving torque so you can drive more fasteners on a single battery charge, improving efficiency on large projects
• Specially designed sharp point - penetrates hard wood products and engineered wood with ease, reducing splitting and the need for pre-drilling
• T27 6-lobe drive - delivers a secure bit fit that minimizes cam-out, resulting in easier driving and extended bit life on the job
• Flat head profile - sits flush with or below the surface for a clean, professional finish on decking and dock boards
• ICC-ES AC233 tested and load rated - verified for shear, pull-through, and withdrawal resistance so you can specify these fasteners with confidence in structural applications
• Compatible with wood, engineered wood, and polymer materials - versatile across deck and dock framing applications without switching fastener types

Why This Product

• Built for high-corrosion environments - Type 305 stainless steel construction makes this screw a reliable choice for docks, boardwalks, and coastal decking where moisture and corrosive conditions would degrade standard zinc-coated fasteners
• Structurally verified, not just functional - tested to ICC-ES acceptance criteria AC233, this fastener carries published load ratings for shear, pull-through, and withdrawal, giving builders and inspectors the documentation they need
• Faster installation without sacrificing holding power - the box-thread geometry reduces the torque needed to drive each screw, which means less battery drain and less installer fatigue on large deck or dock projects
• Engineered for exterior structural connections - from outdoor deck framing to marine dock construction, the combination of sharp point, flat head, and stainless steel material addresses the demands of exterior load-bearing fastening in a single screw

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #14
• Length: 4 in.
• Head Type: Flat Head
• Head Diameter: 0.460 in.
• Drive Type: T27 6-Lobe
• Thread Type: Box Threads
• Point Type: Sharp Point
• Material: Type 305 Stainless Steel
• Finish: Type 305 Stainless Steel
• Approx. Count Per Lb.: 26
• Country of Origin: Taiwan

Available Pack Options

• S14400WP5: 5 Lb (130) - includes (1) T27 6-lobe driver bit
• S14400WPB: 700 Pk - includes (2) T27 6-lobe driver bits

Frequently Asked Questions

What applications is the Simpson Strong-Drive DWP Wood SS screw designed for?

This screw is designed for deck, dock, boardwalk, and general exterior structural connections where extra corrosion protection and load specifications are required - particularly in areas near water or where the fasteners will be exposed to high or severe corrosion conditions.

Is this screw structurally rated, and what does that mean?

Yes. The Strong-Drive DWP Wood SS screw has been tested in accordance with ICC-ES acceptance criteria AC233 and carries published load ratings for shear, pull-through, and withdrawal resistance. This means the fastener can be specified for exterior structural connections with verified performance data to support building inspections and engineering reviews.

What drive bit does the #14 x 4" DWP Wood SS screw require?

This screw uses a T27 6-lobe drive. The 6-lobe interface provides a secure bit engagement that reduces cam-out during driving and extends the service life of your driver bit.

When should I choose Type 316 stainless steel instead of the Type 305 version?

Type 305 stainless steel offers strong corrosion resistance for most exterior and high-moisture applications including docks and decks near water. For seaside or marine environments with direct saltwater exposure, upgrading to a Type 316 stainless steel version is recommended for an additional level of corrosion protection.