Bolt & Nut CUP Head / GALVANISED

Cup Head Bolt & Nut Galvanised are heavy-duty fastener sets designed for external timber and structural connections. The smooth, rounded cup head sits flush against the timber surface, providing a neat, snag-free finish ideal for decking, pergolas, fencing and general outdoor construction.

Overview

• Cup head (carriage bolt) and nut set
• Galvanised finish for corrosion resistance in external applications
• Square section under the head prevents bolt rotation during tightening
• Available in M8, M10, M12 and M16 diameters
• Multiple length options to suit different timber thicknesses
• Sold in packs — not as individual pieces

Key Features & Benefits

• Dome-shaped cup head provides a smooth, rounded surface — reduces snag and injury risk
• Square neck under head self-locks into timber, eliminating the need for a second spanner
• Hot-dip galvanised coating delivers reliable corrosion resistance for outdoor use
• Consistent thread pitches ensure correct nut engagement across all sizes
• Strong bolt and nut combination suitable for structural timber-to-timber connections
• Wide range of diameters and lengths covers most residential and light commercial requirements

Applications

• Deck frame and decking board connections
• Pergola and verandah timber structures
• Fence rail and post fixing
• Gate hardware and garden structures
• Landscaping retaining walls and sleeper connections
• General external timber-to-timber fastening