Fastener needs vary from project to project and the safety and life expectancy of the project can be extended or compromised based upon the fastener used. Fasteners have been designed to meet the special needs of projects such as roofing or drywall and in many cases are known by the application for which they are intended (roofing nails, drywall screws, masonry nails, etc. Used to secure railroad ties. Log construction. Hot galvanized with a high quality zinc coating to resist rust and weathering.