Rackstuds are an alternative to cage nuts which are used to mount IT, A/V, security, and telecommunications equipment in 19″ racks. Unlike cage nuts, Rackstuds go in from the front, which is said to simplify installations. They are made from a non-conductive fibre-reinforced thermoplastic and therefore do not pose an electrical threat to the installers or their gear.
Rackstuds are designed to fit EIA square punched vertical rails with 9.5 mm (3/8″) holes. They can accommodate variations in this size between 9.3 mm (0.366″) and 9.8 mm (0.385″). The vertical rail thickness can be up to 2.2 mm (0.086″) with a recommended maximum equipment faceplate thickness of 4 mm (0.157″).