StarTech.com M6 Cab screws and Cage nuts are used to mount rackmount computer equipment to a storage cabinet or server rack. Coming in a complete package of 50 screws and 50 nuts, there's enough to setup any rack you might be working on.
StarTech.com M6 Screws and Cage Nuts - 50 Pack - M6 Mounting Screws and Cage Nuts for Server Rack and Cabinet - Silver (CABSCREWM62B) - rack screws and nuts
Rack screws and nuts
50 nuts, 50 mounting screws for server rack cabinet