Simpson Strong-Drive DWP Wood Screw, #14 x 3", 316 Stainless Steel Flat Head is a load-rated structural fastener engineered for exterior applications where corrosion resistance and proven performance are non-negotiable. Built from Type 316 stainless steel, this flat-head wood screw delivers reliable holding power in deck, dock, boardwalk, and general exterior construction - especially in coastal, waterfront, or chemically aggressive environments where standard fasteners fall short. Tested in accordance with ICC-ES acceptance criteria AC233, the Strong-Drive DWP is a trusted choice for contractors and builders who need documented shear, pull-through, and withdrawal resistance ratings on structural connections.

Key Features

• Type 316 stainless steel material and finish - provides superior corrosion resistance compared to standard stainless grades, making this screw well-suited for seaside, waterfront, and high-humidity environments where severe corrosion exposure is a concern
• T27 6-lobe drive type - delivers a secure bit-to-fastener fit that reduces cam-out and stripping, resulting in easier driving and significantly extended bit life over long installations
• Unique box thread design - the raised-ridge thread geometry greatly reduces driving torque so you can drive more fasteners per battery charge, improving productivity on large deck and dock projects
• Specially designed sharp point - penetrates dense hardwoods, engineered wood products, and polymer materials with minimal effort, reducing pre-drilling requirements
• Flat head profile with 0.460 in. head diameter - sits flush with the surface for a clean, professional finish on deck boards and structural assemblies
• ICC-ES AC233 load-rated structural fastener - tested for shear, pull-through, and withdrawal resistance, providing the engineering documentation required for permitted structural applications
• 3 in. length in #14 screw size - delivers deep penetration and strong holding power across a range of structural timber and exterior framing connections

Why This Product

• Built for high and severe corrosion environments - Type 316 stainless steel is specifically formulated to withstand saltwater, marine spray, and harsh chemical exposure, making this screw the right choice for docks, boardwalks, and coastal decks where lesser finishes corrode prematurely
• Load-rated for structural confidence - because these fasteners are tested to ICC-ES AC233 acceptance criteria, engineers and inspectors have the rated shear, pull-through, and withdrawal values they need to approve structural connections - removing guesswork from permitted projects
• Torque-reducing thread design saves time and battery life - the box thread with raised-ridge technology means less resistance per screw driven, which translates directly to faster installation and fewer battery swaps on large exterior framing or decking jobs
• Versatile for deck, dock, and general exterior structural connections - whether fastening wood, engineered wood, or polymer materials in a waterfront or upland setting, this screw is designed to perform across the range of applications that demand both corrosion protection and structural accountability

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #14
• Length: 3 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 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Approx. Count Per Lb: 36
• Country of Origin: Taiwan

Available Pack Options

• T14300WP1: 1 Lb (36) - includes (1) T27 6-lobe driver bit
• T14300WP5: 5 Lb (180) - includes (1) T27 6-lobe driver bit
• T14300WPB: 1000 Pk - includes (2) T27 6-lobe driver bits

Approved Applications

• Deck construction and deck board fastening in exterior and waterfront settings
• Dock and pier structural connections exposed to water, marine spray, or saltwater environments
• Boardwalk framing and exterior structural assemblies near water
• General exterior applications requiring documented load ratings and high corrosion resistance
• Connections in wood, engineered wood, and polymer materials

Frequently Asked Questions

What makes Type 316 stainless steel the right choice for coastal or waterfront fastening?

Type 316 stainless steel contains a higher molybdenum content than standard 304 stainless, which provides enhanced resistance to chloride-induced corrosion - the type most common in saltwater and marine environments. Simpson specifically recommends this material for seaside applications, docks, boardwalks, and any exterior connection exposed to high or severe corrosion conditions.

Are these screws structurally load-rated, and what testing standard applies?

Yes. The Strong-Drive DWP Wood SS screws have been tested in accordance with ICC-ES acceptance criteria AC233 and are load rated for shear, pull-through, and withdrawal resistance. This documentation supports use in permitted structural connections where an engineer or inspector requires verified load values.

What drive bit is required for the T27 6-lobe drive?

These screws require a T27 6-lobe (Torx-style) driver bit. The 6-lobe geometry provides a secure, positive fit between the bit and the fastener head, which minimizes cam-out during installation and extends bit life - particularly useful during high-volume deck and dock framing work.

Do these screws require pre-drilling when used in hardwood or dense exterior materials?

The Strong-Drive DWP features a specially designed sharp point intended to penetrate hard wood products and engineered wood with ease, which reduces or eliminates the need for pre-drilling in many applications. However, pre-drilling near board ends or in very dense hardwoods may still be advisable to prevent splitting.

Note: Product dimensions may differ from picture. Please refer to the specifications listed above for accurate dimensions.