Simpson #10 x 3-1/2" Bugle-Head Wood Deck Screw with #2 Square Drive in Type 316 Stainless Steel is engineered by Simpson Strong-Tie for demanding exterior wood fastening applications where long-term corrosion resistance is essential. Designed specifically for wood decking installations - including cedar, redwood, and preservative-treated lumber - this coarse-thread screw delivers a secure, flush-set connection that holds up against moisture, salt air, and harsh outdoor conditions. The Type-17 point and bugle head design work together to make installation fast and clean, reducing the chance of surface damage while driving the screw to a perfectly countersunk finish.

Key Features

• Type 316 Stainless Steel material - provides superior corrosion resistance in coastal, seaside, and chemically aggressive outdoor environments where standard fasteners would deteriorate prematurely
• Bugle head design with 0.340" head diameter - allows the screw to countersink flush with the wood surface without tearing or mushrooming the deck board, leaving a clean, professional finish
• Type-17 point - cuts into wood fibers on contact for fast, self-starting drives that reduce the effort needed to begin each fastener without pre-drilling in most applications
• Coarse threads along approximately 2/3 of the shank - draw decking boards and substrate tightly together, creating a strong wood-to-wood connection with excellent pull-through resistance
• #2 Square (Robertson) drive - reduces cam-out compared to Phillips drives, giving the installer better torque transfer and more consistent driving performance even in demanding conditions
• 3-1/2" length - provides ample penetration depth for securing standard wood decking to structural joists and framing members
• #10 screw size with coarse threads - sized for robust holding strength in softwood and hardwood decking materials without requiring excessive driving force

Why This Product

• Type 316 stainless steel is specifically recommended for seaside and coastal deck projects where salt spray and moisture would accelerate corrosion in lesser-grade fasteners - this screw keeps the connection strong and the deck surface stain-free over time
• Compatible with cedar, redwood, and preservative-treated wood decking materials, making it a versatile single-fastener solution for nearly any residential or commercial outdoor deck board application
• The bugle head countersinks flush without a separate countersink step, saving installation time and producing a cleaner surface appearance compared to hex-head or pan-head alternatives
• A #2 square driver bit is included with the package, so installers have the correct tool on hand immediately - no separate accessory purchase required to get started

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #10
• Length: 3-1/2 in.
• Head Type: Bugle Head
• Head Diameter: 0.340 in.
• Drive Type: #2 Square
• Thread Type: Coarse Threads
• Point Type: Type-17 Point
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Approx. Count Per Lb.: 56
• Country of Origin: Taiwan

Available Pack Options

• T10350DB1: 1 Lb - includes #2 square driver bit included (replacement bit model BIT2S-2-R2)
• T10350DB5: 5 Lb - includes #2 square driver bit included (replacement bit model BIT2S-2-R2)
• T10350DBB: 1000 Pk - includes #2 square driver bit included (replacement bit model BIT2S-2-R2)

Approved Applications

• Fastening Wood-to-Wood
• Decks - Deck Boards Wood

Frequently Asked Questions

Is this screw suitable for use with pressure-treated wood decking?

Yes. This screw is designed for use with all types of wood decking, including preservative-treated woods. The Type 316 stainless steel material resists the chemical compounds found in treated lumber that can corrode standard fasteners, making it a reliable choice for treated-wood deck installations.

What drive bit does this screw require, and is one included?

This screw uses a #2 square (Robertson) drive. A #2 square driver bit is physically included with the package. If you need a replacement, the compatible replacement bit is model BIT2S-2-R2.

What is the difference between Type 316 and standard stainless steel for outdoor deck screws?

Type 316 stainless steel contains added molybdenum, which gives it enhanced resistance to chlorides and salt - making it the preferred choice for seaside or coastal applications and environments with high moisture or chemical exposure. Simpson specifically recommends Type 316 for these more demanding outdoor conditions.

Does the bugle head on this screw require pre-drilling or countersinking?

No separate countersinking step is needed. The bugle head geometry is designed to self-countersink flush with the wood surface during driving. However, pre-drilling near board ends is recommended to help prevent wood splitting, particularly in hardwood or narrow-width deck boards.