Simpson Deck-Drive DWP Wood Screw in Type 316 Stainless Steel is a high-performance fastener engineered for deck, dock, boardwalk, and general exterior wood applications where superior corrosion resistance is essential. Built with a sharp point and unique box-thread design, this #7 x 1" trim head screw drives smoothly into wood, engineered wood, and polymer materials - making it a reliable choice for fascia, finishing, millwork, and trim work in demanding outdoor environments, including coastal and seaside settings where saltwater exposure demands the extra protection of 316-grade stainless steel.

Key Features

• Type 316 Stainless Steel material - provides enhanced resistance to saltwater, moisture, and corrosive coastal environments, making this screw suitable for seaside and marine-adjacent installations where standard stainless steel may fall short.
• 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 on large deck and dock projects.
• Specially designed sharp point - penetrates hardwood and dense wood products with ease, eliminating the need for pre-drilling in many applications and speeding up installation.
• T15 6-lobe drive - delivers a secure bit fit that reduces cam-out, resulting in an easy, controlled drive and extended bit life across high-volume fastening tasks.
• Trim head design with 0.230" head diameter - sits low and discreet on the surface, making this screw ideal for fascia, trim, and finishing applications where a clean appearance matters.
• Compatible with wood, engineered wood, and polymer materials - provides versatility across the full range of modern deck boards and exterior building products.

Why This Product

• Engineered for coastal and seaside environments - Type 316 Stainless Steel offers a higher level of corrosion protection than standard stainless grades, making this screw the right fastener for docks, boardwalks, and decks exposed to salt air or direct saltwater contact.
• Reduces installation effort and battery drain - the box-thread geometry with raised-ridge technology cuts driving torque significantly, so you get more fasteners driven per charge - a practical advantage on large exterior projects.
• Purpose-built for trim and finishing work - the small 0.230" trim head keeps a low profile on fascia and millwork surfaces, delivering a cleaner finished look compared to standard bugle-head or large-flange screws.
• Sharp point means faster starts in hard materials - the purpose-designed tip bites into dense and engineered wood products quickly, reducing the time and effort spent starting each fastener during decking and exterior trim installation.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #7
• Length: 1"
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Head Type: Trim Head
• Head Diameter: 0.230 in.
• Drive Type: T15 6-Lobe
• Thread Type: Box Threads
• Point Type: Sharp Point
• Approx. Count per Lb.: 303
• Country of Origin: Taiwan

Available Pack Options

• T07100WP1: 1 Lb - includes (1) T15 6-lobe driver bit
• T07100WP5: 5 Lb - includes (1) T15 6-lobe driver bit
• T07100WPB: 5000 Pk - includes (2) T15 6-lobe driver bits

Approved Applications

• Decking, docks, and boardwalks
• Finishing, millwork, and trim
• General exterior wood fastening
• Fascia and exterior trim installation
• Engineered wood and polymer deck board fastening
• Seaside and coastal construction where extra corrosion protection is required

Frequently Asked Questions

Why choose Type 316 Stainless Steel over other finishes for outdoor screws?

Type 316 Stainless Steel provides an elevated level of corrosion resistance compared to standard stainless grades. This makes it the preferred choice for deck, dock, and boardwalk applications in seaside and coastal environments where exposure to salt air and moisture is a constant concern. The material protects the fastener's integrity over the long term in these harsh outdoor conditions.

What materials can the Deck-Drive DWP Wood Screw fasten?

These screws are designed for use with wood, engineered wood, and polymer materials - covering the full range of products commonly used in modern deck boards, fascia, millwork, and exterior trim applications. The sharp point is specifically designed to penetrate hardwood and dense wood products without requiring pre-drilling in most situations.

What is the advantage of the box-thread design on these screws?

The unique box-thread design features raised-ridge technology that greatly reduces driving torque compared to conventional thread profiles. This means less strain on your drill or impact driver and more screws driven per battery charge - a significant benefit when fastening large decks, docks, or boardwalks where hundreds or thousands of fasteners may be required.

Why does this screw use a T15 6-lobe drive instead of a Phillips or square drive?

The T15 6-lobe drive provides a more secure engagement between the bit and the screw head than Phillips or square drives, which reduces cam-out during installation. This results in a smoother, more controlled driving experience and significantly extends the usable life of the drive bit - reducing bit replacement frequency on production fastening jobs.

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