Simpson #7 x 1-5/8" Gray Trim-Head Screw with T15 6-Lobe Drive in Type 316 Stainless Steel is engineered for professional deck builders and contractors who need a clean, low-profile fastening solution that stands up to the harshest coastal and high-exposure environments. Designed specifically for PVC and composite deck boards as well as wood decking, these trim-head fasteners deliver a polished, nearly invisible finish while providing the corrosion resistance that dock, boardwalk, and seaside installations demand. The gray painted head blends seamlessly with popular composite and PVC decking products, making it a go-to choice when aesthetics and durability both matter.

Key Features

• Type 316 Stainless Steel construction - delivers superior corrosion resistance in marine, saltwater, and high-moisture environments where standard fasteners would fail prematurely.
• Trim-head design with 0.230" head diameter - sits low and discreet on the decking surface, producing a clean, finished appearance that won't distract from the deck's visual appeal.
• Gray painted head finish - matched to blend with most major PVC and composite decking manufacturers, reducing the visibility of fasteners and giving the deck a polished, professional look.
• T15 6-Lobe drive - engineered to minimize cam-out during driving, resulting in less bit slippage, easier installation, and significantly longer bit life on large decking projects.
• Type-17 cutting point - bores into material quickly for fast starts, reducing drive time and effort especially when installing multiple boards across a large deck or boardwalk.
• Coarse threads - draw decking boards tightly down to the framing below, creating a firm, rattle-free connection that holds composite or PVC boards securely over time.
• T15 driver bit included - means you can get started immediately without hunting for a compatible bit; replacement bits are available under model BIT15T-2-R2.

Why This Product

• Built for marine and coastal applications - Type 316 stainless steel offers a higher level of corrosion resistance than standard stainless grades, making these screws the right choice for seaside decks, docks, and boardwalks where salt air and moisture are constant factors.
• Designed to complement composite and PVC decking systems - the trim-head profile and gray color coating are specifically developed to match common composite decking products, so fasteners stay subtle and the deck surface looks intentional and professional.
• Reduces installation frustration - the combination of the Type-17 point for fast starts and the 6-lobe drive that resists cam-out means faster, smoother driving with less wear on bits and less physical effort from the installer.
• Versatile across multiple decking applications - suitable for wood deck boards, composite deck boards, docks, and boardwalks, giving contractors and DIYers a single high-performance fastener solution across a range of outdoor projects.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #7
• Length: 1-5/8 in.
• Head Type: Trim Head
• Head Diameter: 0.230 in.
• Drive Type: T15 6-Lobe
• Thread Type: Coarse Threads
• Point Type: Type-17 Point
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Color: Gray
• Approx. Count Per Lb.: 195
• Country of Origin: Taiwan

Available Pack Options

• T07162FT70GR: 70 Pk - includes (1) T15 driver bit included (replacement bit model BIT15T-2-R2)
• T07162FTPGR: 350 Pk - includes (1) T15 driver bit included (replacement bit model BIT15T-2-R2)

Approved Applications

• Decks - Deck Boards Wood
• Dock and Boardwalk
• Decks - Deck Boards Composite

Frequently Asked Questions

Why should I choose Type 316 stainless steel over other finishes for my deck project?

Type 316 stainless steel provides superior corrosion resistance compared to standard finishes, making it particularly well-suited for marine environments, seaside installations, and any high-exposure outdoor application where salt air, moisture, or harsh weather conditions are present. It is the recommended choice for docks, boardwalks, and coastal decks where long-term fastener performance matters.

Will these screws work with composite and PVC decking products?

Yes. These trim-head screws are specifically designed for use with PVC and composite deck boards. The gray painted head is available to match most major composite and PVC decking manufacturers, and the trim-head profile sits low and discreet on the surface for a clean, finished appearance. They are also approved for use on wood deck boards.

What is the purpose of the Type-17 point and coarse threads on these screws?

The Type-17 cutting point allows for fast starts, boring into the decking material quickly without pre-drilling in most applications (though predrilling near board ends is recommended to prevent splitting). The coarse threads draw the decking and other material tightly down to the framing, creating a firm, secure connection that keeps boards snug over time.

What drive bit do I need to install these screws, and is one included?

These screws use a T15 6-Lobe drive. A T15 driver bit is included with your purchase so you can begin installation right away. If you need a replacement bit, the compatible model is BIT15T-2-R2. The 6-lobe drive design helps prevent cam-out, making driving easier and extending the life of your bits on large installations.

Note: Actual product colors may vary from colors shown on your monitor.