A cage nut, also referred to as a captive nut, is a square hole nut that sits inside of a spring-steel cage. The nut is floated within the cage so that it can take up minor alignment adjustments. Can I use square or round based brackets and cabinets interchangeably? If so, how? If not, which type of server cabinet will be easier to mount equipment with square and round brackets - one with square or round mounting holes? Generally most servers and equipment uses square holes. Only certain. Before installing system components, locate the hole pattern in the rack rails to allow adequate Unit height (U) of vertical space. Rack cabinets that meet EIA-310 standards have an alternating pattern of three holes per rack unit. For the front and back vertical rails, the center-to-center hole. Server Cabinet Enclosures – Most new server cabinet enclosures work well with universal square rack holes. They seem to be evenly spaced but not setup for pushing a zip tie or HnL strap through them.
