Simpson #10 x 3-1/2" Square Drive Self-Drilling Bugle-Head Screw in 410 Stainless Steel is an engineered fastener from Simpson designed for reliably attaching wood, plywood, and OSB panels to steel studs. The self-drilling tip eliminates the need for a pre-drilled pilot hole, saving time on framing and sheathing applications. Built from Type 410 stainless steel with an additional corrosion-resistant coating, this bugle-head screw delivers lasting performance in demanding interior and exterior construction environments where standard fasteners may fail prematurely.

Key Features

• Type 410 stainless steel construction with additional corrosion-protective coating - resists rust and degradation in moisture-prone or chemically active environments, extending the service life of the connection
• Bugle head profile drives flush with the work surface - prevents surface tear-out on plywood and OSB panels and creates a smooth, professional finish without countersinking
• #2 square drive recess - provides superior bit engagement and reduced cam-out compared to Phillips drive, keeping the fastener on-axis and reducing installer fatigue during high-volume work
• Self-drilling drill point - penetrates steel studs without a pilot hole, streamlining installation and cutting labor time in metal-framing applications
• Tapping thread design at 16 TPI - threads cut cleanly into steel stud material for a tight, secure hold without pre-tapping
• #10 diameter x 3-1/2" length - delivers ample thread engagement depth for reliable wood-to-steel fastening in wall and floor assemblies
• 0.340" head diameter - distributes clamping load evenly across the panel surface, minimizing the risk of pull-through on OSB and plywood sheathing

Why This Product

• Designed specifically for wood-to-steel-stud applications - this screw handles the dual challenge of penetrating steel while seating cleanly in wood panels, making it the right choice for metal-framed wall and ceiling assemblies
• Type 410 stainless steel with a corrosion-resistant coating provides a higher level of protection than standard zinc-plated fasteners, making it suitable for applications where moisture exposure is a concern
• The combination of a self-drilling point and square drive recess means faster, more controlled installation - fewer stripped fasteners and no pilot-hole step, which adds up on large sheathing jobs
• Engineered by Simpson, a trusted name in structural fastening - this screw is purpose-built to meet the performance demands of professional framing and panel attachment rather than adapted from a general-use design

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #10
• Length: 3-1/2 in.
• Head Type: Bugle Head
• Head Diameter: 0.340 in.
• Drive Type: #2 Square
• Thread Type: Tapping Threads
• TPI: 16
• Point Type: Drill Point
• Material: Type 410 Stainless Steel
• Country of Origin: Taiwan

Available Pack Options

• F10T350BDC: 100 Pk
• F10T350BDB: 1000 Pk

Frequently Asked Questions

What applications is this screw designed for?

This self-drilling bugle-head screw is designed for fastening wood, plywood, and OSB panels to steel studs. The drill point self-penetrates steel framing members without a pilot hole, and the bugle head seats flush with the panel surface - making it well-suited for wall sheathing, subflooring, and ceiling panel attachment in metal-framed construction.

Do I need a pilot hole before driving this screw?

No. The drill-point tip is engineered to self-drill through steel stud material, eliminating the need for a pre-drilled pilot hole. This speeds up installation considerably on jobs with a high volume of panel fasteners.

What drive bit does this screw require?

This screw uses a #2 square drive bit. The square drive recess provides better bit-to-fastener contact than Phillips drive, which reduces cam-out and keeps the screw tracking straight during installation. The replacement bit referenced for this screw is the BIT2S-2-R2.

Why is Type 410 stainless steel used, and is it coated?

Type 410 stainless steel offers good corrosion resistance as a base material and is well-suited for fastening applications where moisture or environmental exposure is a factor. These screws are also coated for additional corrosion protection beyond what the stainless alloy alone provides, making them a durable choice for demanding installation conditions.

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