Simpson Strong-Drive DWP Wood Screw in #14 x 5" Flat Head, Type 316 Stainless Steel is a load-rated structural fastener engineered for demanding exterior applications where both high performance and severe corrosion resistance are required. Designed specifically for decks, docks, boardwalks, and other structures exposed to water, salt air, and harsh outdoor environments, this flat-head wood screw delivers reliable shear, pull-through, and withdrawal resistance backed by testing in accordance with ICC-ES acceptance criteria AC233. The Type 316 stainless steel construction goes beyond standard corrosion protection, making it an ideal choice for seaside and marine-adjacent fastening where ordinary fasteners fail prematurely.

Key Features

• Type 316 Stainless Steel material - provides superior resistance to saltwater, chlorides, and aggressive chemicals compared to standard stainless grades, making it the right choice for seaside decks, docks, and wet exterior structural connections.
• Unique box thread design with raised-ridge technology - significantly reduces driving torque so installers can drive more fasteners per battery charge, improving productivity on large decking and dock projects.
• Specially designed sharp point - penetrates dense and hard wood products with ease, eliminating the need for pre-drilling in many applications and speeding up the fastening process.
• T27 6-lobe drive - provides a secure, positive bit fit that reduces cam-out, resulting in an easier drive, less stripped fasteners, and significantly longer bit life on the job.
• Flat head profile - sits flush with the surface of the wood for a clean, professional finish on decking, boardwalk, and dock surfaces where a low-profile fastener is required.
• Load-rated for shear, pull-through, and withdrawal resistance - tested to ICC-ES AC233 acceptance criteria, giving engineers and builders the documented performance data needed for structural exterior connections.
• Compatible with wood, engineered wood, and polymer materials - offers versatility across a wide range of exterior decking and structural substrates without changing fastener types.

Why This Product

• Built for high and severe corrosion environments - Type 316 stainless steel is the specified material for applications near saltwater, brackish water, or chemical exposure, where lesser finishes like zinc or standard 304 stainless would corrode and compromise structural integrity over time.
• Structural load ratings simplify the approval process - because these screws are tested to ICC-ES AC233 and carry published shear, pull-through, and withdrawal values, contractors and engineers can use them in permitted structural connections without additional field testing or custom engineering.
• Reduced torque means faster, more efficient installation - the box thread and raised-ridge technology lower the energy required per fastener, which translates directly to less battery drain and more screws driven per charge on large dock or deck builds.
• The 5" length in #14 diameter handles substantial structural connections - providing deep penetration and strong withdrawal resistance in thick lumber assemblies typical of dock framing, boardwalk decking, and heavy exterior structural applications.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #14
• Length: 5 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: 21
• Country of Origin: Taiwan

Available Pack Options

• T14500WP1: 1 Lb (21) - includes (1) T27 6-lobe driver bit
• T14500WP5: 5 Lb (105) - includes (1) T27 6-lobe driver bit
• T14500WPB: 500 Pk - includes (2) T27 6-lobe driver bits

Frequently Asked Questions

What makes Type 316 stainless steel the right choice for dock and seaside deck applications?

Type 316 stainless steel contains a higher molybdenum content than standard stainless grades, which provides enhanced resistance to chlorides, saltwater, and other corrosive agents found in marine and coastal environments. For docks, boardwalks, and decks near water where high or severe corrosion exposure is expected, 316 stainless significantly outperforms standard finishes in long-term durability and structural integrity.

Are these screws structurally rated and code-compliant for permitted construction?

Yes. The Strong-Drive DWP Wood SS screws have been tested in accordance with ICC-ES acceptance criteria AC233 and carry published load ratings for shear, pull-through, and withdrawal resistance. This documentation supports their use in permitted exterior structural connections such as deck framing, dock assemblies, and boardwalk construction.

What drive bit is required to install these screws?

These screws use a T27 6-lobe drive, sometimes referred to as a Torx-style drive. The 6-lobe design provides a secure bit engagement that reduces cam-out during driving, extending bit life and improving driving consistency - particularly on large-scale projects where many fasteners are installed in a single session.

What materials can these screws be used with?

The Strong-Drive DWP Wood SS flat-head screws are suitable for use with wood, engineered wood, and polymer materials. Their sharp point is designed to penetrate hard wood products with ease, making them a versatile option for exterior structural connections across a variety of common decking and dock substrates.

Note: Product dimensions may differ from picture. Please see the item description above for accurate dimensions.