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Timco Carriage Bolts & Hex Nuts - Silver - M16 x 150mm

Timco Carriage Bolts & Hex Nuts - Silver - M16 x 150mm

A domed head bolt with a square anti-spin shoulder, primarily used for clamping timber or attachin...

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Product Information

Full details

The Timco M16 x 150mm Carriage Bolt is designed for professional builders, carpenters, and DIY enthusiasts who require a reliable fastening solution for heavy-duty timber construction and ironmongery attachment. Its hallmark feature is the square anti-spin shoulder under a domed head, which locks into the timber to prevent rotation during tightening; however, users should note that as a grade 4.8 carbon steel fastener, it is primarily intended for standard structural applications rather than high-tensile engineering requirements.

All features

Model Part NumberPTDTIM16150CB
BrandTIMco

Extended Product Information

FAQs

What is the head diameter of this M16 bolt?

The head diameter is 38.00mm.

Is the bolt fully threaded?

Yes, this specific 150mm length is fully threaded.

Can I use these bolts for saltwater environments?

While zinc-plated carbon steel offers decent protection, it is not recommended for direct coastal or marine use. Consider stainless steel for such applications.

Does this package include the nuts?

Yes, the Timco carriage bolts include the necessary hex nuts.

What tools are required to install this?

You will need a drill with a 16mm+ bit, a hammer or mallet to seat the head, and a wrench or socket to tighten the nut.

What does the grade 4.8 indicate?

Grade 4.8 is a standard carbon steel specification, indicating it is suitable for general-purpose structural fastenings but not for critical high-stress engineering components.

Troubleshooting

Bolt spins while trying to tighten the nut

Ensure the square shoulder is fully embedded into the wood by tapping the bolt head with a hammer.

Bolt is difficult to insert into the hole

Verify that the hole diameter is correct and clear of debris or timber burrs.

Nut feels gritty or difficult to thread

Clean the bolt threads to remove any wood shavings or debris that may have entered during installation.

Pros and Cons

Pros

  • Integrated anti-spin square prevents rotation during installation
  • Nut included in the package for convenience
  • Durable carbon steel construction
  • Zinc plating resists surface rust
  • Clean domed head profile for a finished look

Cons

  • Not suitable for high-tensile load-bearing applications
  • Carbon steel can rust if the zinc coating is breached in harsh outdoor environments
  • Requires a pilot hole to seat the square shoulder properly

Setup, Compatibility & Care

To ensure a secure fit, always drill a hole slightly larger than the 16mm bolt diameter to allow for clearance, then use a mallet to seat the square shoulder into the wood. Compatibility is universal for standard M16 nuts and washers, though you should ensure you are pairing these with compatible timber materials. For maintenance, periodically check the nuts for tightness as timber may shrink over time, especially in changing weather conditions. If signs of oxidation appear, clean the surface and apply a clear rust inhibitor.

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