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Coach Screws

Buy Coach Screws

Coach screws are the go-to fixing when you need serious holding power in timber. Whether you're bolting structural frames, fixing decking joists, or securing heavy timber to masonry, these heavy-duty hex head fasteners do the job that a standard wood screw simply can't.

We stock coach screws in a full range of sizes - M6 through to M12 - in zinc plated and hot dip galvanised finishes to suit both indoor structural work and exposed outdoor applications.

What Are Coach Screws Used For?

Coach screws (sometimes called lag screws or lag bolts) are large-diameter, hex-head fasteners designed for heavy timber connections. Common applications include:

- Timber frame and structural joinery
- Decking and outdoor structures
- Garden buildings, pergolas, and fencing
- Fixing timber wall plates to masonry
- Heavy-duty racking and shelving

The hex drive means you tighten them with a spanner or socket wrench - not a screwdriver. That's what gives them the torque to pull thick timbers together tight.

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