Square Plate Washer M12 x 50 x 3.0

Square Plate Round Hole Washers BZP – M12 x 50 x 3.0 are heavy-duty mild steel plate washers designed to spread fastening loads across a wider surface area, preventing pull-through and surface damage in structural and construction applications. Bright zinc plated (BZP) for reliable corrosion resistance, these M12 square washers are a staple fixing for trade professionals and serious DIYers working with timber, fencing, and general steelwork.

Key Features and Specifications

• Material: Mild steel with bright zinc plated (BZP) finish
• Standard: BS 3410 square plate washer
• Plate dimensions: 50mm x 50mm (W x L)
• Thickness: 3.0mm
• Hole type: Round hole, 12mm diameter — fits M12 bolts
• Finish: Bright zinc plating with Trivalent Chromium (Cr3) coating for enhanced rust protection
• Construction: Heavy-duty; suitable for high-stress structural connections
• Available in: Bags and bulk trade boxes

Applications

• Spreading load on M12 coach bolts, hex bolts, and threaded rods in timber framing
• Securing gravel boards to fence posts using flat cleats
• Bolting through walls, beams, and joists in structural construction
• Anchoring systems and post-base fixings requiring increased bearing support
• General construction, groundworks, and industrial fastening where a heavy square washer is specified

Why Choose This Product

The 50 x 50mm square profile delivers a significantly larger clamping surface than a standard round washer, preventing fastener pull-through in timber and softer substrates. The 3mm plate thickness provides rigidity under load, while the BZP finish offers dependable corrosion resistance for both indoor and sheltered outdoor use. Suitable for trade volume orders and compatible with all standard M12 fastening systems.

Delivery in and Around London

We deliver Square Plate Round Hole Washers BZP – M12 x 50 x 3.0 across London, including inner boroughs such as Croydon, Lewisham, Southwark, Camden, and Hackney, as well as Greater London areas including Enfield, Bexley, Redbridge, and Barnet. We also supply trade customers throughout Kent, Essex, Surrey, and Hertfordshire. Trade quantities are welcome — contact us for bulk pricing and same-day despatch options.