The Simpson #7 x 1-5/8" Self-Drilling Siding Screw in Type 410 Stainless Steel is engineered for professional siding and trim installation where secure, corrosion-resistant fastening to steel framing is required. Built with a self-drilling tip that eliminates pre-drilling into metal studs, a low-profile trim head for a clean finished appearance, and a full-thread shank for maximum holding power, this screw is a purpose-built solution for attaching wood siding, wood panels, and metal trim directly to steel studs. Packaged in a 1,000-piece pack, it supports high-volume production work without interruption.

Key Features

• Type 410 Stainless Steel Construction - Heat-treatable 410 stainless provides the hardness needed to self-drill through metal framing while offering corrosion resistance suited to exterior applications, something standard stainless grades cannot reliably deliver in a self-drilling format.
• #3 Drill Point - Self-starting tip bores directly through steel studs without pre-drilling, reducing labor time and keeping exterior siding and trim projects moving efficiently.
• Low-Profile Trim Head - The compact head design sits flush or near-flush with surface materials, producing a clean, finished look on visible siding and trim installations.
• #1 Square Drive - Provides positive torque transfer and reduces cam-out during installation, giving installers better control and less bit slippage on the job.
• Full Thread Length - Threading runs the entire shank length, maximizing grip strength throughout the fastener and improving pull-through resistance in siding and panel applications.
• 1,000-Piece Pack - High-count packaging keeps large siding and trim crews supplied without frequent restocking, supporting uninterrupted workflow on commercial and residential projects.

Why This Product

• No pre-drilling required - The #3 drill point penetrates steel studs directly, eliminating a step that slows down siding and trim installation and reducing overall labor on the job site.
• Material matched to the application - Type 410 stainless steel is specifically chosen because its hardenability through heat treatment gives the screw the structural toughness to self-drill metal framing - a performance characteristic that softer stainless grades cannot provide.
• Engineered for clean exterior finishes - The trim head profile and full-thread engagement work together to seat the screw securely and neatly into wood siding and metal trim without surface damage or proud heads that require additional finishing work.
• Designed for high-volume use - With 1,000 screws per pack and a reliable square drive that resists cam-out, this product is built for production-rate installation where consistency and speed across many fasteners matter.

Specifications

• Model Number (MPN): F07T162TDM
• Screw Size: #7
• Length: 1-5/8 in.
• Head Diameter: 0.230 in.
• Head Type: Trim Head
• Drive Type: #1 Square
• Point Type: #3 Drill Point
• Thread Length: Full
• TPI (Threads Per Inch): 19
• Max. Grip Length: 1.169 in.
• Material / Coating: Type 410 Stainless Steel
• Packaging Quantity: 1,000

Approved Applications

• Attaching wood siding to steel studs
• Fastening wood panels to steel framing
• Securing metal trim to steel studs

What's Included

• 1,000 x Simpson F07T162TDM #7 x 1-5/8" Self-Drilling Siding Screws, Type 410 Stainless Steel

Frequently Asked Questions

Do these screws require pre-drilling into steel studs?

No. The #3 drill point is a self-drilling tip that bores through steel studs without any pre-drilling required, saving installation time on siding and trim projects.

What drive bit is compatible with these screws?

These screws use a #1 square drive, which reduces cam-out and provides positive torque transfer. The compatible replacement bit model is BIT1S-2-R2.

Why is Type 410 stainless steel used for these screws instead of standard stainless?

Type 410 stainless steel is hardenable through heat treatment, which gives the screw the hardness necessary to self-drill through metal framing components - a property that standard austenitic stainless grades typically cannot achieve.

What applications are these screws designed for?

These screws are purpose-built for fastening wood siding, wood panels, and metal trim directly to steel studs, making them well suited for exterior siding and trim installation work. The 1,000-piece pack is intended for high-volume, production-level applications.