SPAX Decking Screws 6x40mm A4 316 Stainless Steel are the premium choice for decking in harsh marine and coastal environments. A4 316 stainless steel offers significantly superior corrosion resistance compared to A2 304, making these screws the right choice where salt air, moisture, and chemical exposure are a concern.

Key Benefits

• A4 316 Stainless Steel — marine-grade stainless with superior corrosion resistance. The go-to choice for coastal, waterfront, and high-moisture decking applications.
• 6mm diameter (12G) — heavier gauge for increased shear strength and holding power in demanding decking applications.
• T-Star Plus Drive (T25) — exclusive to SPAX. Provides a positive, secure bit engagement for better driving torque and reduced cam-out.
• Cylindrical head (7mm) — countersinks cleanly into timber with minimal splitting, leaving a neat, professional finish.
• Fixing thread — locks the decking board firmly in place, minimising cupping, squeaking, and movement over time.
• SPAX Ground Serration Thread — allows quick and easy fastening with reduced driving torque.
• CUT Point — no pre-drilling required on most timbers.
• Box of 200 — great value for decking projects.

Ideal Applications

The 6x40mm A4 316 is ideal for coastal and marine decking, pool surrounds, jetties, boardwalks, and any outdoor timber application where maximum corrosion resistance is essential. The 40mm length suits thinner decking boards and composite profiles.

Specifications

• Length: 40mm
• Diameter: 6mm (12G)
• Head Type: Cylindrical Head
• Head Diameter: 7mm
• Partial Thread Length: 23mm
• Drive: T-Star Plus T25
• Material: A4 316 Stainless Steel (Marine Grade)
• Quantity: Box of 200
• SKU: 0538000600403

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