Description
BZP Cup Square Hex Coach Bolts (also known as carriage bolts) are strong threaded fasteners commonly used for joining timber or timber-to-metal connections. They feature a smooth domed head with a square neck underneath, designed to grip into the material and prevent the bolt from turning when the nut is tightened.
The square section beneath the head embeds into timber or fits into a square hole, allowing the bolt to lock in place so tightening can be done from the nut side only.
The Bright Zinc Plated (BZP) finish provides basic corrosion resistance, making these bolts suitable for general construction and indoor or sheltered outdoor applications.
Key Features
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Domed Cup Head – Smooth finish with no drive slot
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Square Neck Design – Prevents the bolt from spinning during tightening
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Bright Zinc Plated (BZP) – Helps protect against corrosion
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Supplied with Hex Nut – Ready for installation
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Strong Threaded Fixing – Ideal for structural timber joints
Typical Applications
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Timber framing and joinery
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Decking structures and garden projects
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Fence and gate construction
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Bolting timber beams or joists together
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Timber-to-metal fixing applications
Installation Guidance
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Drill a hole through the materials being joined.
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Insert the coach bolt so the square section sits into the timber.
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Fit the washer and tighten the hex nut using a spanner or socket.
As the nut tightens, the square neck grips into the material to stop the bolt rotating, creating a strong and secure connection.
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