StarTech.com Rack Screws - 20 Pack - Installation Tool - 12 mm M5 Screws - M5 Nuts - Cabinet Mounting Screws and Cage Nuts - Rack Screw, Cage Nut - 12 mm - Silver - 20 / Pack This 20-pack of M5 rack screws and M5 cage nuts is convenient to have on hand for installing rack-mountable equipment, such as your server, network or audio/video equipment. Each pack includes a cage nut installation tool to ensure a fast and simple installation of each cage nut. The cabinet mounting screws and cage nuts are also suitable for new server rack and cabinet setups - perfect for those times when you drop or misplace a nut or two. The bulk pack ensures that you have enough available when you need them. The M5 mounting screws and the M5 nuts come in a nickel-plated finish to prevent rust. The CABSCRWM520 is backed by a StarTech.com 2-year warranty.