Galvanized flat washers, M4x12mm

There are many sizes and styles of screws available. As construction materials and techniques evolve, fastener design keeps pace with the changing technology. 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