Hot Dipped Galvanised Carriage Bolts

About Hot Dipped Galvanised Carriage Bolts

Hot dipped galvanised carriage bolts, also known as cup square bolts, are designed for secure timber connections where strength and corrosion resistance are required. The domed head provides a smooth, finished appearance, while the square anti-spin shoulder beneath the head bites into the timber to prevent rotation during tightening.

Each bolt is supplied with a matching nut, providing a complete fixing solution for clamping timber sections together or attaching ironmongery to timber. This allows secure tightening from one side and makes installation straightforward on site.

Designed for External Timber Applications

Manufactured from grade 4.8 carbon steel and finished with hot dipped galvanising, these carriage bolts are built to perform in demanding external environments. The hot dipped galvanised coating provides protection against corrosion and withstands up to 500 hours salt spray, making it suitable for outdoor timber structures.

Hot dipped galvanised carriage bolts are commonly chosen for:

• External timber construction
• Fencing and gates
• Decking subframes and landscaping structures
• General outdoor structural timber connections

Typical Applications

These carriage bolts are widely used for clamping timber and fixing ironmongery to timber in outdoor settings. The domed head provides a neat, low-profile finish, making them suitable for visible installations.

Choosing the Right Bolt Size