Perfect your outdoor project and create a polished final look with the Hammered Dome Cap Nuts by OZCO. Cover and protect your OZCO Timber Screws (sold separately) by attaching these accent pieces via their included threaded washer. Crafted from aircraft-grade aluminum and thoroughly powder-coated for resistance, Hammered Dome Cap Nuts are approved for use with ACQ Treated Lumber and deliver a classic, western-style detail rather than the look of screw heads along your structure. Build an outdoor living area your family and guests won't want to leave with OZCO.