Simpson #8 x 3/4" Self-Drilling Wire-Lath Modified Truss-Head Screw in Type 410 Stainless Steel is engineered by Simpson Strong-Tie for reliable fastening in steel and metal framing applications. Designed with a self-drilling drill point and tapping threads, this screw drives directly into metal without the need for predrilling - saving time and labor on metal lath installation and corrugated panel attachment. The wide modified truss head distributes clamping force evenly across the work surface, making it a dependable choice for residential, agricultural, and commercial construction projects where metal-to-metal fastening is required.

Key Features

• Type 410 Stainless Steel construction - can be hardened through heat treatment, giving this screw the strength needed to drill through metal without stripping or snapping under load.
• Self-drilling drill point - eliminates the need for predrilling pilot holes, speeding up installation when fastening metal lath to steel studs or attaching corrugated siding panels.
• Modified Truss Head with 0.42 in. head diameter - the low-profile, wide head maximizes bearing surface contact, reducing the chance of pull-through and providing a secure, flush-fitting result on thin metal substrates.
• #2 Phillips drive - compatible with standard #2 Phillips bits, allowing use with common power drivers already on the jobsite for faster, more consistent installation.
• 18 TPI tapping threads - thread pitch engineered specifically for steel and metal applications, providing strong thread engagement and reliable holding power in steel studs and metal framing members.
• 0.291 in. max grip length - sized for precision in thin-material fastening scenarios, ensuring proper thread engagement without over-penetration in single- to multi-layer metal panel assemblies.
• 3/4 in. overall length - compact profile designed for thin-gauge metal-to-metal fastening where a shorter screw is required to avoid breakthrough on the back side of framing.

Why This Product

• No predrilling required for metal lath and stud work - the drill point tip bores through metal on contact, cutting installation steps and keeping your workflow moving on metal framing and wire lath projects.
• Purpose-built for wire lath and corrugated panel applications - the combination of a modified truss head, drill point, and 18 TPI tapping threads addresses the specific demands of attaching metal lath to studs and securing corrugated siding to steel framing.
• Stainless steel construction suited for hardened metal fastening - Type 410 stainless steel can be heat-treated for hardness, allowing it to penetrate steel studs and metal substrates that softer materials cannot handle reliably.
• Meets requirements across residential, agricultural, and commercial job types - engineered to Simpson Strong-Tie standards for performance and strength, making this screw a versatile option across a wide range of metal-framing project types.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #8
• Length (in.): 3/4
• Head Type: Modified Truss Head
• Head Diameter (in.): 0.42
• Drive Type: #2 Phillips
• Point Type: Drill Point
• Thread Type: Tapping Threads
• TPI: 18
• Max. Grip Length (in.): 0.291
• Material: Type 410 Stainless Steel
• Country of Origin: Taiwan

Available Pack Options

• F08T075KDC: 100 Pk
• F08T075KDM: 1000 Pk
• F08T075KDB: 6000 Pk

Approved Applications

• Wire lath fastening to steel studs
• Corrugated siding panels to steel studs

Frequently Asked Questions

Does this screw require predrilling before installation into steel studs?

No. This screw features a self-drilling drill point that penetrates metal on contact, allowing it to be driven directly into steel studs and metal framing without a pilot hole. This reduces installation steps and speeds up work on metal lath and corrugated siding projects.

What type of driver bit does this screw require?

This screw uses a #2 Phillips drive, which is compatible with standard #2 Phillips bits used in most power drivers and drills commonly found on the jobsite.

Is Type 410 stainless steel the same as Type 316 or Type 305 stainless steel for corrosion resistance?

No. Type 410 stainless steel can be hardened through heat treatment, which gives it the ability to drill through metal. However, it does not offer the same level of corrosion resistance as either Type 316 or Type 305 stainless steel. For environments requiring maximum corrosion resistance, a higher-grade stainless may be more appropriate.

What specific fastening tasks is this screw designed for?

This screw is designed for fastening metal lath to steel studs and attaching corrugated siding panels to steel studs. The modified truss head, drill point, and 18 TPI tapping threads work together to address the demands of these metal-to-metal fastening applications in residential, agricultural, and commercial construction.

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