A rubber fendering system is a form of protection from boats and ships colliding with docks. Often seeen in large ports, commonly used fasteners include hex bolts with a coupling nut or sleeve welded on.
Piling U-Bolts fit around pilings used in marine construction, and are often longer and wider than u-bolts that are readily available in the marketplace.
Cleats are found in marinas and are used to tie boats to a dock. The fastener most commonly used with cleats is a hex bolt, which is used to anchor the cleat to the dock.