Simpson #10 x 3" Square Drive Self-Drilling Bugle-Head Screw in Type 410 Stainless Steel is engineered for reliable wood-to-steel fastening in residential, agricultural, and commercial construction. Designed by Simpson Strong-Tie, these self-drilling fasteners eliminate the need for pre-drilling, making them a go-to choice for attaching wood, plywood, and OSB panels directly to steel studs. The bugle head profile drives flush with the work surface for a clean, professional finish, while the Type 410 stainless steel construction with additional corrosion-protective coating ensures long-term durability in demanding environments.

Key Features

• Bugle head design - sits flush with the work surface upon installation, reducing surface damage and providing a smooth, finished appearance without countersinking.
• #2 square drive - delivers superior bit engagement compared to Phillips drives, reducing cam-out and improving installation efficiency, especially during high-volume fastening tasks.
• Self-drilling drill point - bores through steel on contact without a pilot hole, saving time and labor on wood-to-steel framing applications.
• Tapping screw threads at 16 TPI - form their own mating threads in steel studs for a tight, secure mechanical connection that resists loosening over time.
• Type 410 stainless steel with added corrosion coating - provides enhanced resistance to rust and degradation, extending fastener service life in moisture-prone or outdoor-adjacent environments.
• 3" length with 2.466" max grip length - accommodates thick panel assemblies, giving installers the holding depth needed for structural wood-to-steel connections.
• 0.340" head diameter - distributes clamping load across the panel surface to reduce pull-through and maintain a secure hold in wood, plywood, and OSB substrates.

Why This Product

• Built specifically for wood-to-steel applications - the combination of a self-drilling point, tapping threads, and bugle head makes this screw purpose-designed for fastening OSB, plywood, and dimensional lumber to steel studs, eliminating the guesswork of selecting a general-purpose fastener.
• Corrosion resistance for long-term performance - Type 410 stainless steel paired with an additional protective coating makes these screws a reliable choice in projects where moisture exposure or corrosive conditions are a concern.
• Reduces installation steps and tool changes - the drill point self-taps through steel studs without pre-drilling, while the square drive minimizes bit slippage, keeping projects moving efficiently.
• Trusted Simpson Strong-Tie engineering - Simpson metal screws are designed to meet the performance requirements of residential, agricultural, and commercial construction standards, offering consistent quality across fastening applications.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #10
• Length: 3 in.
• Head Type: Bugle Head
• Head Diameter: 0.340 in.
• Drive Type: #2 Square
• Thread Type: Tapping Threads
• TPI: 16
• Point Type: Drill Point
• Max. Grip Length: 2.466 in.
• Material: Type 410 Stainless Steel
• Country of Origin: Taiwan

Available Pack Options

• F10T300BDC: 100 Pk
• F10T300BDB: 1500 Pk

Approved Applications

• Fastening Wood-to-Steel (wood, plywood, and OSB panels to steel studs)

Frequently Asked Questions

Do these screws require a pilot hole before driving into steel studs?

No. These screws feature a self-drilling drill point that penetrates steel on contact, so no pre-drilling or pilot hole is needed. This saves significant time during installation, particularly on large framing projects.

What drive bit is needed to install these screws?

These screws require a #2 square drive bit. The square drive socket provides strong bit-to-screw engagement and reduces cam-out compared to Phillips-style drives, resulting in cleaner, faster installation.

Are these screws suitable for outdoor or moisture-exposed applications?

These screws are made from Type 410 stainless steel and carry an additional corrosion-protective coating, making them well-suited for environments where moisture exposure is a factor. For highly corrosive or saltwater-adjacent environments, evaluate the specific exposure conditions against the material rating.

What panel thicknesses can these screws accommodate?

With a 3" overall length and a maximum grip length of 2.466 in., these screws can accommodate substantial panel assemblies - enough depth for wood, plywood, or OSB panels fastened to steel stud framing in residential, agricultural, and commercial construction.

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