M12 x 180mm Hot Dip Galvanised Cup Head Bolts & Nuts

M12 x 180mm Hot Dip Galvanised Cup Head Bolts & Nuts are built for deep, heavy-duty timber connections in outdoor and structural applications. The extended 180mm length and robust 12mm diameter provide maximum holding strength for thick posts, beams, and framework. Coated with hot-dip galvanisation, they offer excellent rust protection in harsh environments including coastal and high-moisture areas. The rounded cup head delivers a smooth, secure finish—perfect for decks, fencing, pergolas, and large timber structures.