Stainless Steel Bolts are perfect fasteners for the marine industry due to their corrosion-resistant properties. Our bolts are made from ASTM F593C steel which is a higher quality alloy steel. They provide extremely well in fresh water and salt water climates. Stainless steel fasteners can be used for building docks or attaching accessories to your dock. Our bolts are a 5/16-18 hex head cap screws and are available in various lengths. Packaged in quantities of 12.