Square Drive Flat Head Sheet Metal Screws are designed with a counter-sunk head designed for flush-mount fastening of brackets, contacts, and systems.  The recessed Square drive, also known as "Dot"or "Robertson" is fast becoming the favorite among technicians who have used them. With a recessed Square Drive, tremendous torque may be used without stripping the head. They will also hold onto a driver better than any other standard drive style for screws. These screws are case hardened (Grade 5) and also Zinc plated to help resist corrosion.

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