This collection consists of screws and fasteners that are accepted for post installation. Depending on the medium that the post fastener is in, and what the railing recommends, will determine the type and length of screw or fastener needed.
SDWS Simpson Strong-Tie Timber screws are a great option of aluminum posts when attaching to wood substructure through decking. Typically, 4" Screws are sold, but if the posts are working with cable infill, you might want to consider 5" screws.
GRK Caliburn XL are the best option for attaching posts to a concrete patio or walkway. Caliburn XL screws are rated for high sheer values, and are equipped with special teeth to grab the concrete. Just make sure to pre-drill correctly.