Simpson #8 x 1-5/8" 316 Stainless Steel Deck-Drive DWP Wood Screw is a premium exterior fastener engineered by Simpson for decking, dock construction, boardwalks, and general outdoor wood applications where superior corrosion resistance is essential. Driven by a T20 6-lobe bit, this flat-head wood screw combines a specially designed sharp point with unique box threads to deliver fast, clean penetration into today's hardwood and engineered deck boards - making it a reliable choice for coastal, seaside, and other demanding environments where standard fasteners fall short.

Key Features

• Type 316 stainless steel material and finish - provides heightened resistance to saltwater, chemicals, and harsh coastal environments, making this screw well-suited for seaside and waterfront installations where extra corrosion protection is required.
• Unique box thread design with raised-ridge technology - greatly reduces driving torque so you can drive more screws on a single battery charge, increasing productivity and reducing fatigue on large decking projects.
• Specially designed sharp point - penetrates hardwood, engineered wood, and polymer deck board materials with ease, eliminating the need for pre-drilling in most applications and speeding up installation.
• T20 6-lobe drive - offers a secure bit-to-fastener fit that reduces cam-out, resulting in easier driving and extended bit life over the course of a project.
• Flat head profile with 0.335 in. head diameter - sits flush with the deck board surface for a clean, snag-free finish on decking, fascia, trim, and millwork applications.
• #8 screw size at 1-5/8" length - sized appropriately for fastening deck boards, fascia, and trim to standard framing, giving a solid mechanical connection without over-penetrating thinner materials.

Why This Product

• Built for coastal and high-moisture environments - Type 316 stainless steel is specifically chosen for seaside and dock applications where elevated chloride exposure would corrode standard fasteners, extending the service life of the overall structure.
• Designed around modern deck board materials - the box thread geometry is engineered to work with the full range of wood, engineered wood, and polymer deck boards commonly used today, reducing the risk of splitting or surface damage during installation.
• Reduces installer fatigue and battery drain - the low-torque box thread design means each screw drives with less effort, which translates directly into more screws per charge and less physical strain during full-day deck builds.
• Versatile sizing for decking, fascia, and trim - this screw size is part of a broader DWP lineup offered in multiple sizes, making it adaptable across different fascia, trim, and structural decking tasks on the same job site.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #8
• Length: 1-5/8 in.
• Head Type: Flat Head
• Head Diameter: 0.335 in.
• Drive Type: T20 6-Lobe
• Thread Type: Box Threads
• Point Type: Sharp Point
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Approx. Count per Lb.: 150
• Country of Origin: Taiwan

Available Pack Options

• T08162WP-RP15: 15 Pk
• T08162WP-RP85: 85 Pk - includes (1) T-20 6-lobe bit included (BIT20T-2)
• T08162WP1: 1 Lb - includes (1) T20 6-lobe driver bit
• T08162WP-RP340: 340 Pk - includes (1) T-20 6-lobe bit included (BIT20T-2)
• T08162WPP: 350 Pk - includes (1) T20 6-lobe driver bit
• T08162WPB: 4000 Pk - includes (2) T20 6-lobe driver bits

Approved Applications

• Deck boards and decking surfaces
• Docks and boardwalks
• Fascia and trim installation
• Finishing and millwork
• General exterior wood fastening where extra corrosion protection is needed

Frequently Asked Questions

Why is Type 316 stainless steel recommended for exterior and coastal applications?

Type 316 stainless steel provides a higher level of corrosion resistance compared to standard stainless grades, making it especially appropriate for seaside, dock, and waterfront environments where exposure to saltwater, moisture, and chemicals is ongoing. The DWP Wood SS screw is specifically designed to deliver this extra protection for deck, dock, and general exterior use.

What types of wood and materials can the DWP Wood SS screw be used with?

The DWP screw's sharp point and box thread design make it ideally suited for the majority of wood used in today's deck boards, including wood, engineered wood, and polymer materials. It is also available in sizes appropriate for fastening fascia and trim.

What is a box thread design and why does it matter?

The unique box thread design features raised-ridge technology that greatly reduces the driving torque required to seat the screw. This means less strain on the installer and less drain on cordless tool batteries, allowing more screws to be driven on a single charge during large decking or dock projects.

What drive bit does this screw require?

This DWP Wood SS screw uses a T20 6-lobe drive. The 6-lobe interface provides a secure fit between the bit and the fastener, which reduces cam-out during driving and helps extend bit life across extended installations.

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