M8 X 40 Cup Square Carriage (Coach) Bolts Galvanised Mild Steel DIN 603

Galvanised coach bolts are used in outdoor timber construction for their rust-resistant coating and ability to create strong, secure joints, particularly in applications like fencing, decking, and garden structures. The square neck under their domed head prevents them from turning when tightening the nut, and the galvanised zinc coating provides a durable barrier against rust and corrosion, making them ideal for weather-exposed conditions