Simpson #6 x 1-1/4" Square Drive Self-Drilling Bugle-Head Screw in 410 Stainless Steel is a purpose-built fastener from Simpson designed for securely attaching wood, plywood, and OSB panels to steel studs. Engineered with a self-drilling drill point, this bugle-head screw eliminates the need for pre-drilling, saving time on framing and sheathing projects. The Type 410 stainless steel construction with an added corrosion-protective coating makes this screw well suited for applications where moisture exposure or long-term durability is a concern.

Key Features

• Type 410 stainless steel with corrosion-protective coating - resists rust and corrosion in demanding environments, extending the life of the fastened assembly
• Bugle head design with 0.340" head diameter - drives flush with the work surface without tearing the material face, producing a clean, professional finish on wood, plywood, and OSB panels
• #2 square drive - reduces bit cam-out during installation, allowing for faster, more controlled driving compared to Phillips-style drives (compatible with replacement bit BIT2S-2-R2)
• Self-drilling drill point - penetrates steel studs without pre-drilling, speeding up assembly and reducing the number of tools needed on site
• Tapping threads at 20 TPI - grip firmly into steel stud material once the drill point clears, creating a secure, vibration-resistant connection
• #6 screw size at 1-1/4" length - sized for attaching thin sheathing panels to light-gauge steel framing without overdriving or bottoming out

Why This Product

• The self-drilling point combined with tapping threads means you can drive directly into steel studs in a single step - no pilot hole required - making this screw an efficient choice for high-volume framing and sheathing work.
• The bugle head geometry countersinks itself flush without a washer face, making it ideal for sheathing applications where a smooth, flush surface is needed before finishing or additional layer installation.
• Type 410 stainless steel plus an additional corrosion-protective coating gives this fastener a meaningful edge in applications where standard carbon steel screws would corrode prematurely - such as in humid, wet, or chemically exposed environments.
• The #2 square drive reduces slippage and stripped heads during installation, which is especially valuable when driving screws at high speed or in overhead or awkward-angle applications.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #6
• Length: 1-1/4 in.
• Head Diameter: 0.340 in.
• Drive Type: #2 Square
• Head Type: Bugle Head
• Thread Type: Tapping Threads
• TPI: 20
• Point Type: Drill Point
• Material: Type 410 Stainless Steel
• Country of Origin: Taiwan

Available Pack Options

• F06T125BDC: 100 Pk
• F06T125BDM: 1000 Pk
• F06T125BDB: 5000 k

Frequently Asked Questions

What materials can this screw fasten together?

This self-drilling bugle-head screw is designed for fastening wood, plywood, and OSB panels to steel studs. The drill point penetrates the steel stud, and the tapping threads at 20 TPI lock the connection securely.

Do I need to pre-drill a pilot hole before driving this screw?

No. The self-drilling drill point allows the screw to penetrate steel stud material without a pre-drilled pilot hole, making installation faster and reducing the tools needed on the job site.

What drill bit is compatible with the #2 square drive on this screw?

This screw uses a #2 square drive. The compatible replacement drive bit is the BIT2S-2-R2, which is specifically referenced for use with this fastener.

Why is the bugle head design beneficial for sheathing applications?

The bugle head geometry allows the screw to drive flush with the surface of wood, plywood, or OSB without tearing or breaking through the face of the material. This produces a clean result and is particularly important when a smooth, continuous surface is needed for subsequent layers or finishes.

Note: Product dimensions and/or thread length may differ from picture. Please see the item description for specifications.