Simpson #7 x 1-5/8" Trim-Head Screw in Type 316 Stainless Steel is a premium decking fastener from Simpson Strong-Tie, engineered for wood deck boards, docks, and boardwalks where long-term corrosion resistance is critical. The low-profile trim-style head sits flush with the decking surface for a clean, finished appearance, while the #1 square drive delivers secure, slip-free engagement during installation. Whether you're working in a coastal, marine, or high-moisture environment, the Type 316 stainless steel construction withstands saltwater, humidity, and harsh outdoor exposure - making it a reliable choice for demanding decking projects.

Key Features

• Type 316 Stainless Steel material - resists saltwater corrosion and harsh outdoor conditions, making it ideal for marine environments, coastal decks, docks, and boardwalks where standard steel fasteners would degrade prematurely.
• Trim-style head (0.230" head diameter) - sits low and flush against the decking surface, reducing visual impact and delivering a clean, professional finish on wood deck boards.
• #1 Square drive - provides secure, slip-free bit engagement during installation, reducing cam-out and improving control compared to Phillips-style drives.
• Type-17 point - self-drilling tip allows for fast starts without pre-drilling in most applications, speeding up installation and improving productivity on deck framing projects.
• Coarse threads on approximately the lower two-thirds of the shank - draw deck boards tightly and securely against joists, ensuring a firm, stable hold throughout the life of the deck.
• Approximately 195 screws per pound - predictable coverage counts help with project planning and material ordering for deck installations of any scale.
• Driver bit included - the package includes a square drive bit so you can begin installation immediately without sourcing additional accessories.

Why This Product

• Purpose-built for marine and high-exposure decking: The Type 316 stainless steel composition provides a higher level of corrosion protection than Type 304 stainless or standard coated fasteners - critical for docks, boardwalks, and decks in coastal or wet environments where moisture exposure is constant.
• Flush finish without the bulk: The trim-style head is specifically designed to minimize surface visibility on decking, giving wood deck boards a cleaner look than standard bugle-head or flat-head screws without requiring countersinking tools.
• Faster, more reliable installation: The combination of the Type-17 self-drilling point and the #1 square drive reduces slippage and eliminates the need for pre-drilling in most applications, saving time on large decking projects.
• Strong board-to-joist connection: Coarse threads along the lower two-thirds of the shank actively pull deck boards down to the framing - creating a tighter, more secure connection that helps prevent board movement over time.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #7
• Length: 1-5/8 in.
• Head Type: Trim Head
• Head Diameter: 0.230 in.
• Drive Type: #1 Square
• Thread Type: Coarse Threads
• Point Type: Type-17 Point
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Approx. Count Per Lb: 195
• Country of Origin: Taiwan

Available Pack Options

• T07162FB1: 1 LB - includes Driver bit included (replacement bit part number: BIT1S-2-R2)
• T07162FB5: 5 LB - includes Driver bit included (replacement bit part number: BIT1S-2-R2)
• T07162FBB: 4000 Pk - includes Driver bit included (replacement bit part number: BIT1S-2-R2)

Approved Applications

• Decks - Deck Boards Wood
• Dock and Boardwalk

Frequently Asked Questions

Why use Type 316 stainless steel screws for decking instead of standard coated screws?

Type 316 stainless steel offers superior resistance to corrosion from saltwater, moisture, and harsh outdoor conditions. For marine environments, coastal decks, docks, and boardwalks where prolonged exposure to water and humidity is expected, Type 316 stainless steel maintains structural integrity and appearance far longer than standard zinc-coated or Type 304 stainless fasteners.

Do I need to pre-drill when installing these trim-head screws into deck boards?

The Type-17 point is designed to allow for fast starts and self-drilling action in most decking applications, reducing or eliminating the need for pre-drilling in the field. However, pre-drilling is recommended near board ends to help prevent splitting of the wood.

What drive bit do I need for the #1 Square drive, and is it included?

These screws use a #1 Square drive. A compatible driver bit is included in the package. If a replacement is needed, the replacement bit part number is BIT1S-2-R2.

How do the coarse threads on this screw help with deck board installation?

The coarse threads run along approximately the lower two-thirds of the shank. This thread design actively pulls the deck board down and draws it tightly against the joist framing below, creating a firm, stable connection that minimizes movement and gaps between the board and the framing over time.