Cup Square Bolts – Zinc-Plated, Grade 8.8

Our Cup Square Bolts—also known as coach bolts or carriage bolts—are manufactured from high-strength Grade 8.8 steel and finished with a durable zinc-plated coating for long-lasting corrosion resistance. The smooth rounded cup head and square neck are designed to lock securely into timber or metal, preventing rotation during tightening.

These bolts are widely used across construction, agriculture, and structural applications, including frames, brackets, timber assemblies, workshop builds and polytunnel structures.