Product Info Catalog Building Materials Construction Connectors, Straps & Angles Post Cap, Zmax Coated, Double Post Nailing Post Cap, Zmax Coated, Double Post Nailing Request a Quote UPC: 707392380504 Manufacturer: Simpson Strong Tie SKU: 153120 Model Number: BCS2-2/4Z Post cap, with zmax, allows for the connection of 2x2s to a 4x post, double shear nailing between beam & post gives added strength.