Stainless steel fasteners (bolts, lag screws, hex-head cap screws, nuts and washers) are typically made of 18-8 grade stainless steel - it offers good corrosion resistance and machines rather easily. They may show some evidence of staining, but are acceptable fasteners, especially when used with ACQ pressure-treated materials. Use only passivated stainless steel fasteners below the waterline to avoid severe corrosion and eventual failure. McFeely’s™ stainless steel fasteners have been passivated, so that this is not an issue.

Hot-Dip Galvanized fasteners have been the standard for heavy-duty applications for many years, and still perform well. They are most often used with pressure-treated materials for inland structures, or those around freshwater. Threaded connections are slightly sloppier than stainless steel fasteners to accommodate the variabilities of the galvanizing process. Our hot-dip galvanized fasteners have a minimum tensile strength of 60,000 psi, and conform to either ANSI/ASME B18.5 (carriage bolts) or ANSI/ASME B18.2.1 (lag screws and hex-head cap screws).