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Forgefix Carriage Bolts Review: Reliable timber fastening solution?

ForgeFix Carriage Bolts | M6 x 130mm | Zinc Plated | Bag 10
4.7
[Standards Compliant]  Meets DIN603 (bolt) and DIN934 (nut) standards for reliable quality and compatibility.
[Fully Threaded to 100mm]  Full threading ensures secure fastening and adjustable engagement across lengths up to 100mm.
[Also Known As Coach Bolts]  Identified as coach or cup square hex bolts for clear specification and easy sourcing.
[Anti-Rotation Square Section]  Square section under dome head prevents rotation during tightening for quicker, more secure installation.
[Ideal For Timber Joints]  Designed primarily for timber-to-timber connections, offering robust joinery in woodworking projects.
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Automotive parts and accessories designed to provide secure fastenings for timber-to-timber joins. Confidence in every joint reduces rework and keeps on-site work moving, with Forgefix Carriage Bolts. Are these carriage bolts the reliable option for routine carpentry and repair tasks?

⚡ At a Glance
  • Holding Strength: Square section under dome head stops rotation, fully threaded up to 100mm for deep thread engagement, conforms to DIN603 and DIN934.
  • Best for: Carpenters, joiners and DIYers needing secure timber-to-timber fastenings
  • Not ideal for: Applications requiring specialised heads or non-standard fastener types

Conforms to DIN603 for bolts and DIN934 for nuts, M6 x 130mm zinc plated carriage bolts supplied in bags of 10. Mainly intended for joining timber to timber, with a square section beneath the dome head to prevent rotation.


Anti-rotation fastening – with square section beneath the dome head

The square section sits into the timber as the head is tightened, creating a mechanical lock that stops the bolt turning. That geometry allows the bolt to be tightened from one side without the head spinning.

Faster single-person assembly and more consistent torque on joints, making on-site fitting simpler and neater.

Deep, uniform thread engagement – with full threading up to 100mm

Threads extend for up to 100mm along the bolt, giving extended engagement length for clamping timber. Threads are cut to match standard bolt and nut dimensions referenced by DIN603 and DIN934.

Reliable clamping across thicker timbers and predictable thread performance when pairing with compatible nuts.

Standards-based sizing – thanks to DIN603 and DIN934 conformity

Manufacture to DIN603 for bolts and DIN934 for nuts ensures dimensional compatibility with common hardware and tools. Standard conformity helps when replacing parts or matching with off-the-shelf nuts.

Accurate sizing reduces sourcing headaches, and user feedback confirms consistent, well-cut threads for dependable fit.

✨ The 4 Key Reasons for Forgefix Carriage Bolts
  1. Zinc plated, Durable finish, users report reliability across multiple woodworking projects
  2. Fully threaded up to 100mm, Ensures long engagement for thick timber joints with secure clamping
  3. Square section under dome head, Prevents rotation when tightened, enables single-person assembly on-site
  4. Bag of 10, Convenient bundle, ideal for small projects and routine repairs
📋 Technical Details at a Glance
  • Category: Automotive Parts and Accessories
  • Brand: Forgefix
  • Material/Finish: Zinc plated
  • Size: M6 x 130mm
  • Threading: Fully threaded up to 100mm
❓ Frequently Asked Questions

Q: What standards do these bolts conform to?

A: They conform to DIN603 for the bolt and DIN934 for the nut, ensuring standardised dimensions and compatibility.

Q: How long is the threaded section on the bolt?

A: The threaded portion extends for up to 100mm of the bolt length, allowing deep thread engagement in timber joints.

Q: What prevents the bolt from turning during tightening?

A: A square section beneath the dome head seats into the timber and stops the bolt rotating when tightened.

🏆 Our Verdict

The Forgefix Carriage Bolts are well suited to DIYers, carpenters and joiners who need consistent, anti-rotation fasteners for timber-to-timber work. Conformity to DIN603 and DIN934, combined with the square under-head section and full threading, gives reliable, predictable joints. Retail costs vary, but accurate sizing and durable construction deliver solid long-term value.