Engineered for Strength. Built for the Coast.

The SPAX Boardwalk Screw Coastal A4 (8mm) is purpose-designed for high-load, long-lasting timber connections in demanding outdoor environments — especially in coastal, marine, or boardwalk applications where corrosion resistance is critical.

Key Features:

• Marine-Grade A4 Stainless Steel

  Made from top-quality A4 (316) stainless steel for extreme corrosion resistance, even in salty coastal air or humid tropical conditions. Ideal for boardwalks, jetties, piers, or any structure exposed to harsh weather.

• Robust 8mm Diameter

  Heavy-duty construction delivers maximum shear strength and load-bearing capacity, making it perfect for structural decking, large timber joints, and foot traffic surfaces.

• SPAX 4CUT Point

  The patented 4CUT tip eliminates the need for pre-drilling in most hardwoods, reduces splitting at board ends, and drives smoothly with less torque – even in dense or aged timber.

• MULTI Head with Milling Ribs

  The countersunk head features under-head ribs that mill cleanly into timber for a flush finish without lifting or cracking. No need to countersink manually – just drive and go.

• Partial Thread Design

  Offers superior clamping force by drawing boards tightly to the substructure – ideal for securing decking boards and preventing movement over time.

Ideal For:

✓ Coastal and marine boardwalks
✓ Timber jetties and platforms
✓ Structural outdoor decking
✓ Heavy-duty landscaping applications

Why Choose SPAX Coastal A4 Screws?

✔ Unmatched corrosion protection (A4 stainless steel)
✔ Built for hardwoods and exposed conditions
✔ No splitting, no pre-drilling in most cases
✔ Long-lasting, professional-grade fastening