5/16-18 x 1 3/4 Phillips Flat Thread Cutting Screw Type F Fully Threaded Zinc MCW They have a wafer head

They have a wafer head and are full thread

The full thread design ensures a secure hold in a variety of materials

The square shape of the nut allows for easy installation and removal with a wrench

The screw is finished with a yellow zinc coating for corrosion resistance

5/16-18 x 1 3/4 Phillips Flat Thread Cutting Screw Type F Fully Threaded Zinc MCW They have a wafer headThe 5 16 18 x 1 3 4 Phillips Flat Thread Cutting Screw Type F Fully Threaded Zinc is a high performance fastener designed for secure and durable connections in various applications. It features a #2 Phillips drive for easy installation and a flat thread cutting design that creates strong threads in soft materials like wood, plastic, and thin metals. The screw is fully threaded for maximum holding power and has a zinc coating for corrosion resistance.