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Hex head self-drilling screws, often referred to as Tek screws, are designed with a hexagonal head that allows for easy tightening using a wrench or a socket. The self-drilling feature means that these screws come with a drill bit tip that can penetrate metal, wood, and other materials without the need for pre-drilled holes. This eliminates the need for additional tools, making installation faster and more efficient.

4. Corrosion Resistance Certain washer materials, such as rubber or specialized coatings, can provide added resistance to moisture and corrosion, extending the lifespan of the fastener.