Throughbolt M10 x 240mm Coach Bolts - High-Strength Structural Fasteners for Construction & Timberwork

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Q: What is a throughbolt used for?

A: A throughbolt is a heavy-duty fastener designed to secure materials like wood or metal by passing fully through components. It provides superior strength compared to standard screws, making it ideal for structural applications such as timber framing or decking.

Q: How do I install an M10 x 240mm coach bolt?

A: Drill a 10mm hole through both materials, insert the bolt's square neck into pre-drilled timber to prevent spinning, then tighten using a washer and nut. The 240mm length allows penetration through thick assemblies while maintaining grip strength.

Q: Are throughbolts and coach bolts interchangeable?

A: While both are threaded fasteners, coach bolts specifically feature a domed head and square neck to lock in wood. Throughbolts may include various head types and often require full-thread engagement for maximum load distribution.

Q: What materials are M10 throughbolts made from?

A: Standard M10 x 240mm throughbolts typically use galvanized steel for corrosion resistance. Higher-grade versions may employ stainless steel or zinc plating for outdoor or marine applications requiring enhanced durability.

Q: Can I use shorter coach bolts instead of 240mm throughbolts?

A: Length depends on material thickness - the bolt must protrude sufficiently for nut engagement. For assemblies under 200mm thick, shorter bolts work, but 240mm ensures proper threading for heavy structural connections requiring vibration resistance.