Simpson Deck-Drive DWP Wood Screw - #7 x 1-1/4" Trim Head in Type 316 Stainless Steel by Simpson is a precision-engineered fastener built for deck, dock, boardwalk, and general exterior wood applications where superior corrosion resistance is a must. Featuring a trim head profile, T15 6-lobe drive, and sharp point tip with box threads, this screw drives cleanly and securely into the majority of wood materials used in today's deck boards - making it an ideal choice for coastal, seaside, and high-moisture environments where standard fasteners fall short.

Key Features

• Type 316 Stainless Steel material - provides enhanced resistance to saltwater, chemicals, and harsh outdoor conditions, making it the right choice for seaside, coastal, and dock applications where extra corrosion protection is needed.
• Unique box thread design with raised-ridge technology - greatly reduces driving torque so you can drive more screws on a single battery charge, improving productivity and extending tool runtime on the job.
• Specially designed sharp point - penetrates hard wood products and engineered materials with ease, eliminating the need for pre-drilling in most decking applications and speeding up installation.
• T15 6-lobe drive - delivers a secure bit fit that reduces cam-out, resulting in easier, more consistent driving and significantly longer bit life compared to traditional drive types.
• Trim head profile (0.230" head diameter) - sits low and discretely against the wood surface for a clean, finished look on fascia, trim, millwork, and finishing applications.
• Compatible with wood, engineered wood, and polymer materials - offers broad versatility across a wide range of deck board products and exterior wood assemblies.
• Approximately 264 screws per pound - gives installers a reliable reference for estimating material quantities and planning larger decking or trim projects.

Why This Product

• Built for coastal and high-moisture environments - Type 316 stainless steel delivers a higher level of corrosion resistance than standard stainless grades, making these screws a dependable choice for docks, boardwalks, and seaside decks exposed to saltwater and humidity.
• Reduces fatigue and extends battery life on the job - the box thread and raised-ridge design lowers driving resistance, meaning less effort per screw and more screws per charge - a real advantage on large decking projects.
• Low-profile trim head for clean finished results - the small 0.230" head diameter keeps the fastener subtle against the surface, making this screw equally useful for fascia boards, trim, and millwork where appearance matters.
• Versatile across today's decking materials - designed to work with solid wood, engineered wood, and polymer materials, so one screw handles a wide range of exterior wood applications without switching products.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #7
• Length: 1-1/4"
• Head Type: Trim Head
• Head Diameter: 0.230 in.
• Drive Type: T15 6-Lobe
• Thread Type: Box Threads
• Point Type: Sharp Point
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Color: None
• Approx. Count per Lb.: 264
• Country of Origin: Taiwan

Available Pack Options

• T07125WP1: 1 Lb - includes (1) T15 6-lobe driver bit
• T07125WPP: 350 Pk - includes (1) T15 6-lobe driver bit
• T07125WP5: 5 Lb - includes (1) T15 6-lobe driver bit
• T07125WPB: 5000 Pk - includes (2) T15 6-lobe driver bits

Approved Applications

• Deck boards and decking surfaces
• Docks and boardwalks
• General exterior wood construction
• Fascia boards and exterior trim
• Finishing and millwork
• Engineered wood and polymer deck materials

Frequently Asked Questions

What makes Type 316 stainless steel better for outdoor applications than standard stainless?

Type 316 stainless steel offers a higher level of corrosion resistance than standard stainless grades, particularly in environments exposed to saltwater, moisture, and harsh chemicals. This makes the DWP Wood SS screw in 316 SS the preferred choice for seaside, coastal, dock, and boardwalk installations where standard fasteners are prone to premature corrosion and failure.

What materials can these screws be used with?

The Deck-Drive DWP Wood SS screw is designed for use with wood, engineered wood, and polymer materials, covering the majority of deck board products in use today. It is also suited for fascia, trim, and millwork applications where a low-profile trim head is needed.

What bit do I need to drive these screws?

These screws use a T15 6-lobe drive, so you will need a T15 6-lobe bit to drive them. The 6-lobe design provides a secure bit fit that reduces cam-out and extends bit life compared to traditional drive types like Phillips or square drive.

Do I need to pre-drill before driving these screws into hardwood decking?

The Deck-Drive DWP features a specially designed sharp point that is engineered to penetrate hard wood products with ease. In most decking and exterior wood applications, pre-drilling is not required, though it may be advisable near board ends to prevent splitting in certain wood species.

Note: Product dimensions and/or thread length may differ from picture.