Hellerman Tyton Racksnap cabinet fixings. Most panels are installed into standard 19" racks with the use of cage nuts. Cage nuts can sometimes prove difficult and time consuming to fit. Rack snap helps to resolve this problem. Features and benefits of the Rack snap are as follows. Quick and easy to install, can be separated for individual fixings, toolless installation, reusable, M5 fixings. Fit rack thickness between 1.2mm & 2.4mm. Rack snaps are fitted as standard to all Hellerman Tyton patch panels.