M12 Nuts, Bolts & Washers

When your project demands serious load-bearing capacity and a rock-solid connection, turn to our range of M12 nuts, bolts, and washers. With a hefty 12mm thread diameter, these fasteners are engineered for heavy construction, large-scale machinery assembly, and critical structural repairs. Whether you are anchoring wall plates, bolting steel beams, or securing heavy plant equipment, our M12 fixings provide the sheer strength and stability needed for demanding applications.

To meet the challenges of any job site, we stock everything from high tensile set screws for superior stress resistance to heavy-duty coach bolts for timber framing. Our inventory also includes specialized through bolts and Joyner bolts for secure masonry and timber fixings, alongside essential locking components like nylon lock nuts and spring washers. Available in durable zinc-plated and corrosion-resistant stainless steel finishes from top brands like FandF, Apex, and Fischer, you can trust our M12 range to hold fast under pressure.

Frequently Asked Questions | FAQ

What size spanner do I need for an M12 nut?

A standard M12 hexagon nut or bolt head typically requires a 19mm spanner or socket. Always double-check your fixings, as some specialized or non-standard bolts may vary slightly.

What size hole do I drill for an M12 bolt?

For a standard clearance fit that allows the bolt to pass through easily without binding, drill a hole of 13mm or 14mm. This provides enough tolerance for alignment while ensuring the head and washer still have a solid bearing surface.

Can I use M12 bolts for structural work?

Yes, but you must select the correct grade. For structural applications, ensure you use high tensile bolts (typically grade 8.8 or higher) rather than standard mild steel. Always check the grade stamped on the head and consult structural engineer specifications for critical loads.