Simpson Deck-Drive DWP Wood Screw in #7 x 2-1/4", Type 316 Stainless Steel, Trim Head, Tan 03 by Simpson is a high-performance exterior fastener engineered for decking, dock construction, boardwalks, fascia, and general outdoor wood applications where superior corrosion resistance is a must. The Type 316 stainless steel material and Tan 03 finish make this trim-head wood screw an ideal choice for seaside, coastal, and high-moisture environments where standard fasteners fail prematurely. Its sharp point and box-thread design work together to deliver fast, low-torque driving through hardwood and engineered wood alike, reducing fatigue and battery drain during large decking projects.

Key Features

• Type 316 Stainless Steel material and finish - provides exceptional resistance to saltwater, chlorides, and harsh coastal or marine environments where standard steel or Type 304 fasteners would corrode and stain decking surfaces.
• Unique box-thread design with raised-ridge technology - greatly reduces driving torque so you can drive more screws per battery charge, increasing productivity and reducing tool wear on large deck or dock installations.
• Specially designed sharp point - penetrates hardwood, engineered wood, and polymer deck boards with ease, eliminating the need for pre-drilling in most applications and speeding up installation.
• T15 6-Lobe drive - provides a secure, positive bit engagement that minimizes cam-out, results in an easier drive, and extends bit life compared to Phillips or square drives.
• Trim head profile with 0.230 in. head diameter - sits low and discreetly on the surface for a clean, finished appearance on fascia boards, millwork, and visible deck trim without the bulk of a standard head.
• Tan 03 color coating - blends with common deck board tones for a visually consistent, professional finish on exposed fastener applications.
• #7 x 2-1/4" sizing - suited for fastening a wide range of standard deck boards, trim, and fascia materials where a slender yet strong fastener profile is needed.

Why This Product

• Built for coastal and wet outdoor environments - Type 316 stainless steel delivers a higher level of corrosion protection than Type 304, making this screw the right choice for docks, boardwalks, and seaside decks exposed to salt air and moisture.
• Engineered to reduce installer fatigue on large jobs - the box-thread geometry lowers driving resistance, meaning fewer battery changes and less wrist strain when fastening hundreds of deck boards in a single session.
• Trim head hides cleanly in wood and polymer surfaces - the low-profile 0.230 in. head is purpose-built for fascia, millwork, and finish trim work where a standard bugle or flat head would look oversized or require countersinking.
• Versatile across today's decking materials - the sharp point and box-thread combination is designed to work with solid wood, engineered wood products, and polymer deck boards, reducing the need to stock multiple fastener types for mixed-material projects.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #7
• Length: 2-1/4 in.
• 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: Tan 03
• Approx. Count per Lb.: 138
• Country of Origin: Taiwan

Available Pack Options

• T07225WJI: 350 Pk - includes (1) T15 6-lobe driver bit
• T07225WCI: 1750 Pk - includes (2) T15 6-lobe driver bits

Approved Applications

• Deck boards and decking surfaces
• Docks and boardwalks
• Fascia and finish trim
• Millwork and exterior woodwork
• General exterior wood fastening where extra corrosion protection is required

Frequently Asked Questions

Why choose Type 316 stainless steel over other stainless options for outdoor decking?

Type 316 stainless steel contains added molybdenum compared to standard Type 304, which gives it greater resistance to chlorides, salt spray, and chemical exposure. This makes the DWP Wood Screw particularly well suited for seaside, coastal, and high-humidity environments like docks and oceanfront decks where corrosion protection is critical to long-term performance.

What materials can this DWP trim-head screw be used with?

The DWP Wood Screw is designed for use with wood, engineered wood products, and polymer deck board materials. Its sharp point and box-thread design allow it to penetrate hard wood products without pre-drilling in most cases, and it is also suited for fascia and trim applications.

What bit is required to drive this screw?

This screw uses a T15 6-Lobe drive, which requires a T15 Torx-compatible bit. The 6-lobe interface provides a secure bit fit that minimizes cam-out and extends bit life compared to Phillips or square drive styles.

Why does this screw have a trim head rather than a standard bugle or flat head?

The trim head has a smaller 0.230 in. diameter profile that sits low and discreetly on the surface. This makes it especially appropriate for fascia boards, millwork, and visible trim applications where a standard larger head would look oversized or leave a prominent mark on finished surfaces. The Tan 03 color further helps the fastener blend into typical deck board tones.

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