M8 Wing Nut - Pack 50 is a pack of 50 wing nuts that are designed to fit M4 threaded screws and bolts. They have a wing-like shape that allows them to be tightened and loosened by hand, without the need for any tools. They are ideal for applications where frequent adjustments are required, such as furniture, machinery, electronics, etc. The wing nuts are made of steel and have a zinc-plated surface that protects them from rust and corrosion and extends their lifespan.