Simpson Self-Drilling Wire-Lath Modified Truss-Head Screw, #8 x 1-5/8" in Type 410 Stainless Steel is a purpose-built metal fastener from Simpson Strong-Tie, engineered for fastening metal lath to steel studs and securing corrugated siding panels to steel framing - all without the need for predrilling. Combining a drill point tip, tapping threads, and a wide-profile modified truss head, this screw delivers reliable pull-through resistance and quick penetration in both residential and commercial metal construction applications. The Type 410 stainless steel construction provides hardness suitable for drilling through metal, making it a practical choice for wire lath attachment and steel-framed exterior cladding projects.

Key Features

• #8 x 1-5/8" size with a 0.42" head diameter - the wide modified truss head distributes clamping load across the material surface, reducing pull-through risk in metal lath and thin panel applications.
• Self-drilling drill point tip - eliminates the need for predrilling pilot holes, saving time and reducing tool changes on the job site.
• Type 410 stainless steel construction - hardenable through heat treatment, giving the screw the strength needed to drill through metal substrates and providing meaningful durability in demanding conditions.
• 18 TPI tapping threads - cut cleanly into metal as the screw advances, creating a secure mechanical hold in steel studs without thread stripping.
• #2 Phillips drive - compatible with standard Phillips bit drivers, making this screw easy to install with common power tools already on the job site.
• 1.166" maximum grip length - accommodates one to multiple panel thicknesses, giving installers flexibility across varying material stack-ups.
• Modified truss head profile - low-profile design sits flush or near-flush against the work surface, reducing snag points on finished metal lath and siding assemblies.

Why This Product

• Designed specifically for wire lath and corrugated siding to steel stud applications - the combination of drill point tip, tapping threads, and wide truss head addresses exactly the demands of these fastening tasks, reducing the chance of mismatched fastener selection.
• Self-drilling capability removes the predrilling step - the integral drill point penetrates steel studs directly, keeping installation moving quickly on residential, agricultural, and commercial framing projects.
• Type 410 stainless steel provides hardenable strength - unlike softer fastener materials, Type 410 stainless steel can be heat treated for hardness, allowing it to drill through metal without tip failure or cam-out under power.
• Backed by Simpson Strong-Tie's engineering standards - Simpson designs these metal screws to meet the requirements of residential, agricultural, and commercial projects, providing confidence in performance across a range of framing and cladding applications.

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #8
• Length (in.): 1 5/8
• Head Type: Modified Truss Head
• Head Diameter (in.): 0.42
• Drive Type: #2 Phillips
• Thread Type: Tapping Threads
• TPI: 18
• Point Type: Drill Point
• Max. Grip Length (in.): 1.166
• Material: Type 410 Stainless Steel
• Country of Origin: Taiwan

Available Pack Options

• F08T162KDC: 100 Pk
• F08T162KDM: 1000 Pk
• F08T162KDB: 3000 Pk

Approved Applications

• Wire Lath - fastening metal lath to steel studs in interior and exterior wall assemblies.
• Corrugated siding panels - attaching corrugated metal panels to steel stud framing in residential, agricultural, and commercial structures.

Frequently Asked Questions

Does this screw require a pilot hole before installation?

No. This screw features a drill point tip that allows it to penetrate steel studs and metal substrates without predrilling a pilot hole, streamlining installation in wire lath and corrugated siding applications.

What drive tool does this screw use?

This screw is driven with a #2 Phillips bit, compatible with standard Phillips-tip power drivers and screwdrivers commonly found on job sites.

Is Type 410 stainless steel the same as Type 316 or Type 305 stainless steel in terms of 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 Type 316 or Type 305 stainless steel. Its primary advantage here is mechanical strength and drilling performance in metal-to-metal fastening applications.

What is the maximum grip length of this screw?

The maximum grip length is 1.166 inches, which accommodates a range of material thicknesses including one to multiple panel layers in typical metal lath and corrugated siding installations.

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