M16 x 300mm Hot Dip Galvanised Cup Head Bolts & Nuts

M16 x 300mm Hot Dip Galvanised Cup Head Bolts & Nuts are engineered for the most demanding timber construction jobs. With an extra-long 300mm length and thick 16mm diameter, these bolts provide deep anchoring and maximum strength for oversized beams, large posts, and structural timber assemblies. The hot-dip galvanised coating ensures long-term protection against rust and corrosion, even in harsh coastal or outdoor environments. Featuring a smooth, round cup head, they offer a flush finish with tamper resistance ideal for heavy-duty frameworks, landscaping, and decking projects.