Simpson #6 x 1-1/4" Bugle-Head Wood Screw with T15 6-Lobe Drive in Type 305 Stainless Steel is engineered for professional-grade wood decking installations where corrosion resistance and fastening performance are critical. Designed by Simpson Strong-Tie, these stainless steel wood screws deliver a clean, flush finish when fastening cedar, redwood, and preservative-treated lumber - making them a go-to choice for outdoor deck construction and similar applications where exposure to moisture and treated wood chemicals demands a more durable fastener material.

Key Features

• Type 305 Stainless Steel material - provides superior corrosion resistance in outdoor environments and when in contact with preservative-treated woods, cedar, and redwood, protecting both the fastener and the surrounding material over the long term
• T15 6-Lobe drive recess - delivers a secure, positive engagement between bit and screw head, significantly reducing cam-outs during driving and extending bit life for more efficient, frustration-free installations
• Bugle head design engineered for flush countersinking - seats smoothly at or below the surface of the wood without tearing fibers, yielding a more concealed and professional-looking finish on decking surfaces
• Type-17 point - self-drilling tip allows for fast, clean starts in wood without pre-drilling in most field conditions, saving time on the job site
• Coarse thread pattern - draws decking boards and other wood material tightly against the framing for a secure, stable connection that resists pull-through
• 0.340" head diameter - sized to provide adequate bearing surface for reliable holding power without overworking the wood surface
• #6 x 1-1/4" sizing - a compact, appropriately scaled fastener for decking and finish wood applications where a smaller profile screw minimizes surface disruption while maintaining strong holding strength

Why This Product

• Built for corrosive outdoor environments - the Type 305 stainless steel construction resists rust and degradation caused by moisture, rain, and the chemicals present in preservative-treated lumber, making this screw a reliable long-term fastener for exposed deck structures
• Cleaner results with less rework - the bugle head's flush countersinking geometry eliminates surface tearing and raised screw heads, delivering a polished, professional appearance that reflects well on finished deck work
• Reduced downtime from stripped bits and cam-outs - the 6-lobe T15 drive geometry maintains firm bit engagement throughout the drive cycle, meaning fewer stripped recesses, fewer damaged screws, and longer usable bit life on the job
• Versatile compatibility with specialty wood species - explicitly suited for cedar, redwood, and preservative-treated woods (non-hardwood), making this screw a dependable all-around choice for a wide range of residential and commercial deck construction scenarios

Specifications

• Brand: Simpson Strong-Tie
• Screw Size: #6
• Length: 1-1/4 in.
• Head Type: Bugle Head
• Head Diameter: 0.340 in.
• Drive Type: T15 6-Lobe
• Thread Type: Coarse Threads
• Point Type: Type-17 Point
• Material: Type 305 Stainless Steel
• Finish: Type 305 Stainless Steel
• Approx. Count Per Lb: 243
• Country of Origin: Taiwan

Available Pack Options

• S06125DT1: 1 Lb (243) - includes (1) T15 6-lobe driver bit
• S06125DT5: 5 Lb (1215) - includes (1) T15 6-lobe driver bit
• S06125DTB: 5000 Pk - includes (2) T15 6-lobe driver bits

Frequently Asked Questions

What types of wood are these screws compatible with?

These bugle-head wood screws are designed for fastening all types of wood decking, including cedar, redwood, and preservative-treated woods (non-hardwood). They are not intended for hardwood decking applications.

What driver bit is compatible with the T15 6-Lobe drive on these screws?

These #6 screws use a T15 6-Lobe drive. The replacement bit model number is BIT15T-2-R2, which is compatible with the 6-lobe recess on these fasteners.

Is pre-drilling required when installing these screws?

The Type-17 point is designed for fast starts without pre-drilling in most situations. However, pre-drilling is recommended near board ends to prevent wood splitting, particularly with cedar and other more split-prone species.

Why is Type 305 Stainless Steel used for decking screws?

Type 305 stainless steel provides superior corrosion resistance compared to standard steel fasteners, making it well-suited for outdoor decking environments where screws are exposed to moisture, rain, and the corrosive chemicals found in preservative-treated lumber. This material helps the fasteners maintain their integrity and appearance over time.

Note: Product dimensions may differ from picture.