4.6 Cup Head B/N Kit – M10 x 25mm HDG

The 4.6 Cup Head B/N Kit – M10 x 25mm HDG is a cup head (carriage) bolt and nut kit with a smooth domed head and square shoulder that resists spinning as the nut is tightened. It’s manufactured from hot-dip galvanised steel, giving it a thick protective zinc coating for long-term corrosion resistance in outdoor, structural, and heavy-duty applications. Hot-dip galvanised for outdoor durability, it’s a common choice for timber fencing, gates and structural timber connections.