Simpson #7 x 3" Trim-Head Screw with T15 6-Lobe Drive in Type 305 Stainless Steel is engineered for fastening PVC and composite decking in marine environments, high-moisture zones, and other high-exposure outdoor applications where corrosion resistance is critical. The low-profile trim-style head sits nearly flush with the decking surface for a clean, finished appearance, while the Type 305 stainless steel construction delivers long-lasting durability against rust and environmental degradation. Designed by Simpson for professional-grade performance, these trim-head decking fasteners combine ease of driving with a refined aesthetic that keeps deck surfaces looking their best for years.

Key Features

• Type 305 Stainless Steel material - provides superior corrosion resistance in marine environments, high-humidity conditions, and other high-exposure outdoor settings where standard fasteners would corrode prematurely.
• Trim Head design with 0.230" head diameter - the smaller, low-profile head sits discreetly on the decking surface, delivering a cleaner finished look compared to standard bugle or flat-head screws.
• T15 6-Lobe drive - the 6-lobe interface reduces driver-bit cam-out, making driving faster and easier while extending the usable life of your drive bits.
• Type-17 cutting point - the self-drilling tip bores into material quickly for fast, clean starts without the need for pre-drilling in most installations, saving time on the job.
• Coarse thread pattern - draws the decking board tightly down against the framing for a firm, secure connection that minimizes board movement and surface squeaking over time.
• #7 screw size at 3" length - sized appropriately to penetrate composite and PVC decking boards and achieve solid engagement with the framing below.
• Available with painted heads in 13 colors - head colors are matched to blend with most major PVC and composite decking manufacturers, keeping fasteners virtually invisible on the deck surface.

Why This Product

• Built for demanding outdoor environments - Type 305 stainless steel construction makes these screws the right choice where standard coated fasteners fall short, including coastal, marine, and perpetually wet applications with PVC or composite decking.
• Professional-grade finish without extra work - the trim head's reduced profile and optional color-matched head options mean the fasteners blend into the deck surface naturally, eliminating the need for plugs or covers to hide screw heads.
• Faster installation with less frustration - the combination of the Type-17 self-drilling point and 6-lobe drive reduces cam-out and pre-drilling requirements, keeping the installation process efficient and reducing driver-bit consumption.
• Reliable board-to-frame connection - coarse threads that engage the framing firmly help lock down composite and PVC boards, reducing movement, noise, and potential long-term fastener back-out.

Specifications

• Brand: Simpson Strong-Tie
• Material: Type 305 Stainless Steel
• Finish: Type 305 Stainless Steel
• Screw Size: #7
• Length (in.): 3
• Head Diameter (in.): 0.230
• Head Type: Trim Head
• Drive Type: T15 6-Lobe
• Thread Type: Coarse Threads
• Point Type: Type-17 Point
• Color: None
• Approx. Count per Lb.: 98
• Country of Origin: Taiwan

Available Pack Options

• S07300FT1: 1 Lb - includes (1) T15 driver bit included (replacement bit model BIT15T-2-R2)
• S07300FT5: 5 Lb - includes (1) T15 driver bit included (replacement bit model BIT15T-2-R2)
• S07300FTB: 2000 Pk - includes (2) T15 driver bits included (replacement bit model BIT15T-2-R2)

Frequently Asked Questions

What decking materials are these trim-head screws designed for?

These screws are specifically designed for use with PVC and composite decking. The trim-head profile and optional color-matched heads are engineered to blend with most major PVC and composite decking manufacturers for a clean, finished appearance.

Why choose Type 305 stainless steel for deck screws?

Type 305 stainless steel provides superior corrosion resistance compared to standard coated or galvanized fasteners, making it the appropriate choice for marine environments, high-moisture outdoor settings, and other high-exposure conditions where rust and corrosion would compromise fastener integrity over time.

Is pre-drilling required before driving these screws?

The Type-17 cutting point is designed for fast starts and can reduce or eliminate the need for pre-drilling in most applications. However, pre-drilling is recommended near board ends to help prevent splitting.

What drive bit is required for these screws?

These screws use a T15 6-Lobe drive. The 6-lobe design helps prevent cam-out during driving, which extends bit life and makes installation easier and more consistent compared to standard square or Phillips drive types.

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