The most likely reason to run out of screws is that all three (3) screw holes in the bracket sides were filled with screws. ONLY four (4) screws per post/beam are required to achieve optimal structural integrity (based on engineering reports completed), which means two (2) screws per side. The third hole is left empty for attaching the optional sunshade bracket or for other accessories that may be attached. If you still need additional screws, please contact us.