M6 Rack Clip Nuts Published 29th July 2016 at 800 × 800 in M6 Rack Clip Nuts, Pack of 50 (PM6CNK) Innovative clip nuts for use with 19″ rack rails up to 2mm thick. Simply slides onto rack rail over the square holes creating a threaded hold and eliminating the need for traditional, fiddly rack nuts. ← Previous