Product Description
Simpson #7 3 in. Self-Drilling Siding Screw in 410 Stainless Steel is built for attaching wood siding, wood panels, and metal trim directly to steel studs. The Type 410 stainless steel construction can be hardened through heat treatment, giving these screws the ability to drill through metal and deliver reliable holding power across demanding framing and cladding applications.
Key Features
- Trim head design - sits low and flush against the surface, leaving a clean, unobtrusive finish on siding and panel installations
- #3 drill point - self-drilling tip penetrates steel studs without a pre-drilled pilot hole, reducing steps and speeding up installation
- #1 square drive - promotes positive bit engagement and reduces cam-out, keeping work moving efficiently (compatible replacement bit: BIT1S-2-R2)
- Type 410 stainless steel, heat-treatable - the hardening capability allows the screw to drill through metal while maintaining strong holding power in structural cladding applications
- 2/3 thread length at 19 TPI - thread geometry engineered to grip securely when fastening wood siding, wood panels, or metal trim to steel framing
Why This Product
- No pre-drilling required - the self-drilling #3 point drives directly into steel studs, cutting out an entire step in the installation process and keeping crews productive on large siding and panel jobs
- Heat-treatable 410 stainless steel - the ability to harden this alloy gives the screw the strength to penetrate metal, making it a practical choice for steel-framed construction where softer fasteners fall short
- Low-profile trim head - the trim head style and 0.230 in. head diameter keep fasteners visually discreet, which matters on exposed siding and finished panel surfaces where appearance counts
- Engineered for three distinct applications - formally approved for attaching wood siding to steel studs, securing wood panels to steel framing, and fastening metal trim to steel studs, giving buyers confidence the screw is purpose-built rather than a general-use substitute
Specifications
- Model Number: F07T300TDM
- Coating/Material: Type 410 Stainless Steel
- Screw Size: #7
- Length: 3 in.
- Head Diameter: 0.230 in.
- Drive Type: #1 Square
- Head Type: Trim Head
- Thread Length: 2/3
- TPI: 19
- Point Type: Drill Point (#3)
- Packaging Qty: 1000
Approved Applications
- Attaching wood siding to steel studs
- Securing wood panels to steel framing
- Fastening metal trim to steel studs
Frequently Asked Questions
- What material are these siding screws made from?
- These screws are made from Type 410 stainless steel, which can be hardened through heat treatment to give it the ability to drill through metal. Note that Type 410 does not offer the same level of corrosion resistance as Type 316 or Type 305 stainless steel.
- Do these screws require pre-drilling into steel studs?
- No. The #3 drill point is a self-drilling tip, allowing the screw to penetrate steel studs without the need for a pre-drilled pilot hole.
- What drive bit is compatible with these screws?
- These screws use a #1 square drive. The recommended replacement bit is model BIT1S-2-R2.
- How many screws are included in this package?
- This package contains 1000 screws, making it well-suited for large-scale siding and panel installation projects.
Note: Product dimensions and/or thread length may differ from picture. Please see item description for specifications.
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