The Simpson Strong-Drive PPHD Sheathing-to-CFS Screw #8 x 1-15/16 in. T25, Yellow Zinc is engineered specifically for fastening wood sheathing materials to cold-formed steel (CFS) framing in residential, agricultural, and commercial construction. Built around a long #5 pilot point and buttress thread design, this flat head screw drives efficiently through sheathing and into metal, delivering consistent, reliable performance for shearwall, diaphragm, and general CFS panel attachment applications. The yellow-zinc coating makes it well suited for dry service and low-corrosion environments, including some fire-rated sheathing assemblies.

Key Features

• Larger #5 pilot point with longer flute - provides efficient, clean penetration through sheathing and into cold-formed steel, reducing the force needed to start and complete each fastening
• Buttress threads and dog-ear point - work together to accelerate drilling through both sheathing materials and metal, helping crews maintain a faster, more consistent installation pace
• T25 6-lobe recess drive - delivers a more secure bit-to-screw engagement, reducing cam-out and driver slippage for greater control during installation
• Code-compliant for shearwalls and diaphragms - PPHD screws may be used as prescribed by the codes for shearwalls and diaphragms as described in AISI S240 and AISI S400, giving builders and inspectors confidence on regulated projects
• Yellow-zinc coating - designed for dry service, low-corrosion environments and some fire-rated sheathing, making these screws appropriate for interior and protected framing applications
• Flat head profile with 0.323 in. head diameter - sits flush against sheathing surfaces for a clean, low-profile finish that does not interfere with subsequent layers or finishes

Why This Product

• Purpose-built for sheathing-to-CFS connections - unlike general-purpose metal screws, the PPHD is specifically designed to drive through wood sheathing and into cold-formed steel framing, combining the right point geometry, thread profile, and shank dimensions for that exact task
• Faster installation without sacrificing holding strength - the combination of the larger #5 pilot point, longer flute, and buttress thread design means the screw penetrates and engages metal quickly, reducing labor time on large shearwall and diaphragm assemblies
• Trusted for code-regulated structural applications - acceptance under AISI S240 and AISI S400 means these fasteners can be specified with confidence on projects where engineered shearwall and diaphragm connections require documented, code-recognized hardware
• Compatible with both auto-feed and hand-drive methods - the PPHD screw comes collated for use in Quik Drive auto-feed screw driving systems and in bulk for hand drive applications, giving installation crews the flexibility to work the way their job site requires

Specifications

• Model Number (MPN): PPHD11516B-4K
• Screw Size: #8
• Length: 1-15/16 in.
• Coating/Finish: Yellow-Zinc Coated
• Head Type: Flat Head
• Head Diameter: 0.323 in.
• Drive Type: T25 6-Lobe
• Thread Type: Buttress Threads
• TPI: 17
• Point Type: Pilot Point
• Point Size: #5
• Maximum Installation Thickness: Two layers of 16 ga. (0.125" total)
• Quantity: 4,000

Approved Applications

• Fastening Wood to Steel - Sheathing

Frequently Asked Questions

What type of steel can the PPHD11516B-4K screw be used with?

This screw is designed to drive through sheathing materials and into cold-formed steel (CFS). The maximum installation thickness is two layers of 16 ga. (0.125" total).

What drive bit is required for these screws?

The PPHD11516B-4K uses a T25 6-lobe drive recess. A T25 driver bit is required for installation.

Are these screws code-compliant for shearwall and diaphragm applications?

Yes. PPHD screws may be used as prescribed by the codes for shearwalls and diaphragms as described in AISA S240 and AISI S400.

Are these screws suitable for outdoor or high-moisture environments?

These screws feature a yellow-zinc coating and are designed for use in dry service, low-corrosion environments and some fire-rated sheathing. They are not intended for high-moisture or highly corrosive outdoor exposure conditions.