The Simpson CBSDQ Sheathing-to-CFS Collated Screw #8 x 1-5/8" Ribbed Flat Head #2 Square Drive 1500-Pk is engineered by Simpson to securely fasten various sheathing materials to cold-formed-steel (CFS) framing with speed and precision. Its self-drilling point with wings drives into materials easily while preventing jacking, and the ribbed flat head with nibs countersinks flush to surfaces for a clean, professional finish. Collated in a curved strip for use with the Quik Drive auto-feed screw driving system, this screw is purpose-built to improve speed, efficiency, and ergonomics on jobs where multiple fasteners must be driven in succession - from sheathing panels to fiber-cement siding applications.

Key Features

• Ribbed flat head with nibs - countersinks flush to the surface automatically, eliminating extra finishing steps and delivering a smooth, professional result.
• #2 undersized square drive - provides positive bit engagement and reduces cam-out during high-volume fastening, keeping work moving efficiently.
• #2 drill point with wings - the self-drilling tip penetrates CFS framing quickly and the wings prevent jacking, keeping sheathing panels tight and properly seated.
• Code-recognized for shearwall and diaphragm assemblies - CBSDQ screws may be used as prescribed by the codes for shearwalls and diaphragms as described in AISI S240, S400 and S213, giving specifiers and inspectors the documentation they need.
• Quik Guard coating - suitable for use in pressure-treated lumber and provides a level of corrosion resistance equivalent to hot-dip galvanization (ASTM A153, Class D) in some exposures, making these screws appropriate for demanding structural and outdoor applications.
• Curved collation compatible with Quik Drive systems - designed for use with the Simpson Quik Drive PRO200SG2 or PRO250G2 auto-feed screw driving systems, reducing fatigue and dramatically increasing installation speed on large sheathing projects.
• Driver bit included - each package ships with driver bit BIT2SU so crews can get to work immediately, with replacement bit BIT2SU available separately when needed.

Why This Product

• Built for high-volume CFS sheathing work - the curved collation format and compatibility with Quik Drive auto-feed systems means installers can drive fastener after fastener without stopping to reload, cutting labor time significantly on large framing and sheathing projects.
• Corrosion resistance you can spec with confidence - the Quik Guard coating delivers hot-dip galvanization-equivalent corrosion resistance (ASTM A153, Class D) in some exposures and is rated for use with pressure-treated lumber, so these screws hold up in the conditions where CFS sheathing assemblies are most commonly built.
• Code-compliant for structural assemblies - approval for shearwall and diaphragm applications under AISI S240, S400, and S213 means this screw satisfies structural requirements without requiring special engineering documentation for standard applications.
• Engineered details that eliminate common installation problems - the drill point with wings prevents jacking while the nibbed flat head self-countersinks, together reducing rework and surface damage that slow down crews on fiber-cement siding and wood-to-steel sheathing applications.

Specifications

• Model Number: CBSDQ158S
• Screw Size: #8
• Length: 1-5/8 in.
• Head Type: Ribbed Flat Head
• Head Diameter: 0.322 in.
• Drive Type: #2 Square, Undersized
• Point Type: Drill Point with Wings
• TPI: 18
• Collation Type: Curved
• Coating/Finish: Quik Guard Coating
• Compatible Tools: Simpson Strong-Tie Quik Drive PRO200SG2 or PRO250G2 auto-feed screw driving systems and attachments
• Quantity: 1,500 per package

Approved Applications

• Fastening Fiber-Cement Siding
• Fastening sheathing materials to cold-formed-steel (CFS) framing
• Shearwall and diaphragm assemblies as described in AISI S240, S400 and S213

What's Included

• 1,500 CBSDQ158S collated sheathing-to-CFS screws
• Driver bit BIT2SU

Frequently Asked Questions

What auto-feed screw driving systems are compatible with the CBSDQ158S?

The CBSDQ158S collated screws install with the Simpson Strong-Tie Quik Drive PRO200SG2 or PRO250G2 auto-feed screw driving systems and their compatible attachments. This system improves speed, efficiency, and ergonomics when driving multiple fasteners in succession.

What type of corrosion resistance does the Quik Guard coating provide?

The Quik Guard coating is suitable for use in pressure-treated lumber and provides a level of corrosion resistance that is equivalent to hot-dip galvanization (ASTM A153, Class D) in some exposures, making it appropriate for demanding outdoor and structural applications.

Are CBSDQ158S screws approved for use in shearwall and diaphragm applications?

Yes. CBSDQ screws may be used as prescribed by the codes for shearwalls and diaphragms as described in AISI S240, S400 and S213, making them a code-compliant choice for cold-formed-steel framing assemblies.

What is the purpose of the drill point with wings on the CBSDQ158S?

The #2 drill point with wings on the CBSDQ158S is specifically designed to prevent jacking - a condition where the screw lifts the sheathing material away from the substrate during driving. This ensures a tight, flush connection between the sheathing and the cold-formed-steel framing.

Note: Product dimensions and/or thread length may differ from picture.