Simpson #8 x 1-5/8" Square Drive Self-Drilling Bugle-Head Screw in Type 410 Stainless Steel is engineered by Simpson Strong-Tie for reliable wood-to-steel fastening in residential, agricultural, and commercial construction. Designed to attach wood, plywood, and OSB panels directly to steel studs, this self-drilling fastener eliminates the need for pre-drilling and delivers a clean, flush finish thanks to its bugle head profile. The Type 410 stainless steel construction - combined with an additional corrosion-protective coating - makes these screws a dependable choice for projects where moisture resistance and long-term holding strength matter.

Key Features

• Type 410 Stainless Steel with corrosion-protective coating - resists rust and degradation in demanding environments, giving fastened assemblies lasting durability beyond what bare carbon steel provides.
• Self-drilling drill point - cuts through steel studs without a pilot hole, saving installation time and reducing the number of tools needed on the job.
• Bugle head drives flush with the work surface - creates a smooth, snag-free finish on wood and panel surfaces without countersinking or additional finishing steps.
• #2 square drive - provides superior bit engagement and reduces cam-out compared to Phillips-style drives, resulting in faster, more controlled driving even in repetitive production work.
• Tapping threads at 18 TPI - thread into steel efficiently and grip securely, maintaining pull-out resistance through the full connection.
• 1-5/8" length with 0.340" head diameter - sized specifically for attaching sheathing and panel materials to light-gauge steel framing without over-penetration.
• #8 screw size - a practical balance of shank strength and fastening speed for light-gauge steel stud applications.

Why This Product

• The self-drilling point means no pre-drilling is required when fastening wood or panel materials to steel studs - reducing labor steps and keeping work moving efficiently on framing crews.
• Type 410 stainless steel plus an added corrosion-protective coating addresses the real-world challenge of moisture exposure in agricultural buildings, coastal construction, and exterior sheathing applications where standard steel fasteners would corrode prematurely.
• The bugle head design distributes clamping load across the panel face and sits flush without tearing the wood fiber surface - important for OSB and plywood installations where fastener protrusion would interfere with finishes or adjacent layers.
• The #2 square drive reduces the frustration of cam-out during high-volume installation, keeping the driving bit engaged and protecting both the fastener head and the surrounding work surface.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #8
• Length (in.): 1-5/8
• Head Type: Bugle Head
• Head Diameter (in.): 0.340
• Drive Type: #2 Square
• Thread Type: Tapping Threads
• TPI: 18
• Point Type: Drill Point
• Material: Type 410 Stainless Steel
• Country of Origin: Taiwan

Available Pack Options

• F08T162BDC: 100 Pk
• F08T162BDM: 1000 Pk
• F08T162BDB: 3000 k

Approved Applications

• Fastening Wood-to-Steel (attaching wood, plywood, and OSB panels to steel studs in residential, agricultural, and commercial framing)

Frequently Asked Questions

Do these screws require a pilot hole when fastening into steel studs?

No. The drill point on this screw is self-drilling, meaning it bores its own hole through the steel stud as it is driven. This eliminates the need for a separate pre-drilling step and speeds up installation when attaching wood, plywood, or OSB panels to light-gauge steel framing.

What drive bit is compatible with this screw?

This screw uses a #2 square drive. A #2 square drive bit is required to install these fasteners. The square drive interface reduces cam-out during driving, which is especially useful during high-volume panel fastening work.

Why are these screws made from Type 410 stainless steel rather than standard steel?

Type 410 stainless steel offers improved corrosion resistance compared to standard carbon steel fasteners. These screws also receive an additional corrosion-protective coating, making them suited for residential, agricultural, and commercial applications where exposure to moisture or corrosive conditions is a concern.

What panel and framing materials are these screws designed to fasten?

These screws are designed specifically for fastening wood, plywood, and OSB panels to steel studs. The combination of tapping threads at 18 TPI, a self-drilling point, and a 1-5/8" length makes them well-matched to light-gauge steel stud framing applications in construction and renovation projects.

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