1/4-28 x 3/8 Phillips Round Machine Screw Fully Threaded Zinc FNH which means that it does

which means that it does not require a washer or other locking device

This 1/4-20 x 1 1/4 Hex Cap Screw Grade 2 Zinc features a hexagonal head and machine threads for secure fastening in various applications

and the bugle head provides a clean

5/16 External Tooth Lock Washer

A325 Type 1 Plain

1/4-28 x 3/8 Phillips Round Machine Screw Fully Threaded Zinc FNH which means that it doesThis 1 4 28 x 3 8 Phillips round machine screw is fully threaded and made of zinc. It has a Phillips drive and a round head. The screw is 3 8 inches long and has a diameter of 1 4 28. It is designed for use in a variety of applications, including woodworking, metalworking, and plastic fabrication. The zinc coating provides corrosion resistance and a durable finish.