★【RELIABLE QUALITY:】Made of top quality carbon steel, black nikel plated. It is not easy to rust, has stable performance, corrosion resistance and high hardness. | ★【SPECIFICATIONS: 】0.63 ''/ 16 mm M6 Thread by 1/2" Long Phillips Pan Head Screw, 50x M6 Cage Nuts, 50x M6 Pan Head Screws, 50x Washers | ★【WIDE APPLICATION:】M6 Rack Mount Screw Kit is great for mounting your rack server cabinets, server shelves, A/V device enclosures, and more. These M6 cage nuts and screws are universally compatible with all square-hole racks and cabinets. | ★【SQUARE CAGE NUT: 】Square cage nut designed for racks and cabinets with square holes, Mounting your standard rack mountable equipment into a server rack or cabinet | ★【STANDARD METRIC:】Our M6 screws and lock nuts conform to the standard metric system. The average error is less than 0.01mm. The thread is very sharp, clean and accurate without burrs. The compact, uniformly stressed thread is not easy to deform and slide during rolling and installation. The deep and clear flat crosshead can make your work easier and improve work efficiency.