Simpson Finish Trim Screw - #7 x 3" in Type 316 Stainless Steel is a high-performance fastening solution from Simpson Strong-Tie, engineered for trim, molding, and finish carpentry work where a clean, low-profile appearance matters. Built from Type 316 stainless steel, this trim head screw delivers reliable corrosion resistance in demanding outdoor environments, coastal applications, and contact with preservative-treated wood - making it a dependable choice for both interior and exterior projects where long-term durability is essential.

Key Features

• Type 316 Stainless Steel material - resists corrosion, saltwater exposure, and chemical degradation, making this screw suitable for exterior, coastal, and preservative-treated wood applications where lesser finishes would fail over time.
• Compact trim head with 0.200" head diameter - the low-profile cylinder head sits flush or sinks cleanly into the work surface, minimizing fastener visibility for a polished finish result.
• Patented SawTooth point technology - cuts into wood fibers on contact to eliminate the need for predrilling, speeding up installation and reducing split risk even near board edges.
• T10 6-lobe drive recess - provides a secure, cam-out-resistant engagement between bit and fastener, extending driver bit life and giving installers confident control during driving.
• Serrated thread design with variable TPI - aggressive thread engagement pulls the fastener down smoothly and increases holding strength in wood substrates.
• 1.50" thread length with underhead threading - the underhead threads actively pull the fastener flush and improve countersinking, boosting pull-through resistance without extra effort from the installer.
• 3" overall length in #7 screw size - provides sufficient penetration depth for securing trim boards and molding to framing or substrate materials with one pass.

Why This Product

• No predrilling required - the SawTooth point self-starts in wood, saving significant time on large trim or molding installations and reducing the number of tools needed on the job.
• Built for harsh environments - Type 316 stainless steel construction means this screw stands up to moisture, salt air, and preservative-treated lumber chemicals that would corrode standard zinc or Type 304 fasteners over time.
• Near-invisible fastening for finish work - the compact 0.200" trim head is designed to disappear into the work surface, making it the right choice when cosmetic appearance of the finished surface is a priority.
• Versatile interior and exterior use - from interior crown molding and casing to exterior trim boards on coastal homes, this single screw handles a broad range of finish carpentry applications without needing to stock multiple fastener types.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #7
• Length (in.): 3
• Head Type: Trim Head
• Head Diameter (in.): 0.200
• Drive Type: T10 6-Lobe
• Material: Type 316 Stainless Steel
• Finish: Type 316 Stainless Steel
• Point Type: SawTooth Point
• Thread Type: Serrated Threads
• Thread Length (in.): 1.50
• TPI: Variable
• Color: None
• Measurement Unit: Pack
• Country of Origin: Taiwan

Available Pack Options

• FT07300T100: 100 Pk - includes (1) T10 6-lobe driver bit
• FT07300T300: 300 Pk - includes (1) T10 6-lobe driver bit

Frequently Asked Questions

Do I need to predrill holes before driving this trim screw?

No predrilling is necessary. The patented SawTooth point is specifically engineered to start and drive into wood without a pilot hole, eliminating that extra step and making installation faster on trim, molding, and similar finish carpentry tasks.

Is this screw safe to use with preservative-treated lumber outdoors?

Yes. Type 316 stainless steel is compatible with preservative-treated wood and provides strong resistance to the corrosive chemicals found in treated lumber, making this screw suitable for both interior and exterior applications including those with ongoing moisture exposure.

What driver bit do I need, and is one included?

This screw uses a T10 6-lobe (Torx-style) driver bit. A T10 6-lobe driver bit is included in the package so you can begin installation right away. The 6-lobe recess also helps prevent cam-out and extends bit life during high-volume driving.

What makes serrated threads and variable TPI beneficial for trim applications?

The serrated thread design cuts aggressively into wood fibers for strong holding power, while the variable thread pitch (TPI) helps reduce driving resistance. Together with the underhead threads, this design improves countersinking and pull-through resistance - keeping trim boards tight against the substrate without surface damage.

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