Product Description
The Simpson Strong-Drive PPHD Sheathing-to-CFS Screw - #8 x 1-15/16 in., T25 6-Lobe, Quik Guard Coating (4,000-Qty, Model PPHDQ11516B-4K) is engineered specifically for driving through sheathing materials and anchoring into cold-formed steel (CFS) framing. Powered by a long #5 pilot point with an extended flute and a buttress-thread and dog-ear point design, these screws deliver faster, more controlled drilling through both sheathing and metal - reducing cam-out and pre-drilling in a single operation. The 6-lobe T25 recess provides a positive, torque-efficient drive interface, while the Quik Guard coating offers corrosion resistance suited to dry service and low-corrosion environments. These screws arrive in a 4,000-count bulk pack and are code-recognized for use in shearwall and diaphragm assemblies per AISI S240 and AISI S400, making them a go-to fastener for residential, agricultural, and commercial cold-formed steel construction.
Key Features
- Larger #5 Pilot Point with Longer Flute - Penetrates sheathing and cold-formed steel quickly without pre-drilling.
- Buttress Threads & Dog-Ear Point - Proprietary thread geometry and dog-ear point provide faster drilling through sheathing and metal for improved installation speed.
- 6-Lobe T25 Recess - Delivers a more secure drive connection, reducing driver-bit slippage and cam-out.
- Code-Recognized for Shearwalls & Diaphragms - PPHD screws may be used as prescribed by the codes for shearwalls and diaphragms as described in AISI S240 and AISI S400.
- Quik Guard Coating - Designed for use in dry service, low-corrosion environments and some fire-rated sheathing assemblies.
- Flat Head Profile - Sits flush with sheathing surfaces for a clean, consistent installation.
- High-Volume Bulk Pack - 4,000 screws per package for sustained production use.
Specifications
- Model Number: PPHDQ11516B-4K
- Screw Size: #8
- Length: 1-15/16 in.
- Head Type: Flat Head
- Head Diameter: 0.323 in.
- Drive Type: T25 6-Lobe
- Thread Type: Buttress Threads
- Threads Per Inch (TPI): 17
- Point Type: Pilot Point (#5)
- Coating / Finish: Quik Guard Coating
- Maximum Install Thickness: Maximum two layers of 16 ga. (0.125 in. total)
- Quantity: 4,000
- Country of Origin: Taiwan
Frequently Asked Questions
- What is the maximum cold-formed steel thickness these screws can fasten through?
- The PPHD Sheathing-to-CFS screw is rated for a maximum thickness of two layers of 16-gauge steel, totaling 0.125 inches. This makes it appropriate for typical cold-formed steel (CFS) framing applications where sheathing is being fastened to light-gauge steel members.
- Are these screws code-recognized for shearwall and diaphragm assemblies?
- Yes. PPHD screws may be used as prescribed by the codes for shearwalls and diaphragms as described in AISI S240 and AISI S400, making them suitable for residential, agricultural, and commercial cold-formed steel construction projects that require code-compliant fastening.
- Can these screws be used with an auto-feed screw driving system?
- Yes. The Strong-Drive PPHD Sheathing-to-CFS screw comes collated for use in Quik Drive auto-feed screw driving systems. They are also available in bulk for standard hand drive applications, giving installers flexibility depending on the job setup.
- What environments are these screws designed for, and what does the Quik Guard coating provide?
- These screws are designed for use in dry service and low-corrosion environments, and are also suitable for some fire-rated sheathing applications. The Quik Guard coating provides corrosion resistance appropriate to those conditions. They are not intended for high-moisture or highly corrosive environments.
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