Product Description
The Simpson #7 2-1/4" Self-Drilling Siding Screw in Type 410 Stainless Steel is engineered for reliable fastening of wood siding, wood panels, and metal trim to steel studs. Featuring a trim head profile, a #3 drill point for self-starting penetration through metal, and a #1 square drive for secure bit engagement, this screw delivers consistent, professional-grade performance in demanding construction applications. Supplied in a convenient 100-piece pack under model number F07T225TDC.
Key Features
- Trim Head: Low-profile trim head sits flush and neat against siding and panel surfaces for a clean finished appearance.
- Self-Drilling #3 Drill Point: Eliminates the need for pre-drilling by penetrating directly through metal studs and framing.
- #1 Square Drive: Provides superior bit engagement and reduced cam-out compared to Phillips-style drives. Compatible with replacement bit model BIT1S-2-R2.
- Type 410 Stainless Steel Construction: Hardenable through heat treatment, giving the screw the strength and hardness necessary to drill through metal substrates.
- 19 TPI Thread: Optimized thread pitch for secure, vibration-resistant fastening in steel stud applications.
- 100-Piece Pack: Supplied in a job-ready quantity suitable for professional and large-scale installation projects.
Specifications
- Model Number: F07T225TDC
- Screw Size: #7
- Length: 2-1/4 in.
- Head Diameter: 0.230 in.
- Head Type: Trim Head
- Drive Type: #1 Square
- Thread Length: 2/3
- TPI: 19
- Point Type: #3 Drill Point
- Coating / Material: Type 410 Stainless Steel
- Packaging Quantity: 100
- Country of Origin: Taiwan
Approved Applications
- Attaching wood siding to steel studs
- Fastening wood panels to steel framing
- Securing metal trim to steel studs
What's Included
- 100 x Simpson #7 2-1/4" Self-Drilling Siding Screws (F07T225TDC)
Note: Product dimensions and/or thread length may differ from picture. Please see item description for specifications.
Frequently Asked Questions
- Do these screws require pre-drilling before installation?
- No. These screws feature a #3 drill point that allows them to penetrate directly through metal studs and framing without the need for pre-drilling, saving time during installation.
- What materials and applications are these screws designed for?
- These screws are engineered for fastening wood siding, wood panels, and metal trim to steel studs. The Type 410 stainless steel construction provides the hardness necessary to drill through metal substrates.
- What drive type and bit are compatible with these screws?
- These screws use a #1 square drive, which provides superior bit engagement and reduced cam-out compared to Phillips-style drives. They are compatible with replacement bit model BIT1S-2-R2.
- What is the thread pitch, and why does it matter for steel stud applications?
- These screws have a 19 TPI (threads per inch) thread pitch, which is optimized for secure, vibration-resistant fastening specifically in steel stud applications.
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