Astrotek M6 Cage Nuts & Screws 10pc Pack Black Color Oxide Finish Phillips Drive Length Fully Threaded The ASTROTEK M6 Cage Nuts Screws Washers for 19' Data Network Rack Cabinet Mount PDU • Includes 10x M6 Screws and 10x M6 Nuts • Nickel-plated finish to prevent rust • Square cage nut design for racks and cabinets with square holes