Simpson #7 x 2-1/4" Deck-Drive DWP Wood Screw in Type 305 Stainless Steel with Trim Head and T15 Drive is a high-performance fastener engineered for deck, dock, and general exterior wood applications where reliable corrosion resistance is essential. Featuring a specially designed sharp point and unique box-thread profile, this stainless steel wood screw drives cleanly into a wide range of deck boards and exterior wood products without pre-drilling in most applications. The compact trim head keeps fastener profiles low and clean, making it a practical choice for decking, fascia, and finish trim work exposed to outdoor conditions.

Key Features

• Type 305 Stainless Steel construction - delivers strong corrosion resistance for exterior, deck, and dock environments where moisture and weather exposure are ongoing concerns
• Unique box-thread design with raised-ridge technology - greatly reduces driving torque so you can drive more screws on a single battery charge, increasing efficiency on large deck projects
• Specially designed sharp point - penetrates hard wood products with ease, reducing the need for pre-drilling and speeding up installation
• T15 6-Lobe drive - provides a secure bit fit for confident screw driving, minimizing cam-out, extending bit life, and reducing installer fatigue
• Trim head style with 0.230" head diameter - sits low and discreet on the work surface, ideal for fascia boards, trim, and finish-sensitive decking applications
• Compatible with wood, engineered wood, and polymer materials - gives installers flexibility across a broad range of modern deck board products and substrates
• #7 x 2-1/4" size - well-suited for fastening standard deck boards and exterior trim where a reliable, mid-length fastener is needed

Why This Product

• Designed specifically for exterior decking and dock applications, the Type 305 stainless steel material provides the elevated corrosion protection needed in wet, outdoor, and high-humidity environments where standard coated fasteners may fall short.
• The box-thread geometry reduces the energy required to drive each screw, which translates directly to less battery drain on cordless tools - a meaningful advantage when fastening large deck surfaces.
• The trim head profile keeps screw heads nearly flush with the board surface, producing a cleaner finished appearance on decks, fascia, and millwork without leaving a raised fastener head.
• The sharp point and box-thread combination work together to make this screw compatible with the wide variety of wood and engineered wood materials used in modern deck construction, reducing the need for multiple fastener types on a single job.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #7
• Length: 2-1/4 in.
• Material: Type 305 Stainless Steel
• Finish: Type 305 Stainless Steel
• Head Type: Trim Head
• Head Diameter: 0.230 in.
• Drive Type: T15 6-Lobe
• Thread Type: Box Threads
• Point Type: Sharp Point
• Color: None
• Approx. Count Per Lb.: 138
• Country of Origin: Taiwan

Available Pack Options

• S07225WP1: 1 Lb - includes (1) T15 6-lobe driver bit
• S07225WPP: 350 Pk - includes (1) T15 6-lobe driver bit
• S07225WP5: 5 Lb - includes (1) T15 6-lobe driver bit
• S07225WPB: 1750 Pk - includes (2) T15 6-lobe driver bits

Approved Applications

• Deck boards and decking surfaces
• Docks and boardwalks
• General exterior wood applications requiring extra corrosion protection
• Fascia and trim fastening
• Finishing and millwork
• Engineered wood and polymer deck board products

Frequently Asked Questions

What materials can the Deck-Drive DWP Wood Screw be used with?

This screw is designed for use with wood, engineered wood, and polymer materials, making it compatible with the majority of wood and composite deck boards used in today's exterior decking and dock construction.

Why does the box-thread design matter for deck installation?

The unique box-thread design with raised-ridge technology significantly reduces the driving torque required for each fastener. This means less strain on your cordless drill or driver battery, allowing you to drive more screws per charge - which is especially valuable on large decking or dock projects.

Is Type 305 stainless steel suitable for coastal or seaside environments?

Type 305 stainless steel provides strong corrosion resistance for most exterior deck, dock, and outdoor applications. For seaside and coastal environments with direct salt air or saltwater exposure, a Type 316 stainless steel screw is recommended for enhanced protection in those more aggressive conditions.

What bit is required to drive this screw?

This screw uses a T15 6-Lobe drive, which requires a T15 Torx-style bit. The 6-lobe socket delivers a secure fit between the bit and screw head, reducing cam-out and extending bit life during extended deck fastening work.

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