Cage Nut

Cage nuts are square-shaped nuts with spring-steel wings designed for installation into the square holes of server racks, network cabinets, and equipment enclosures. The wings compress during insertion, then expand behind the mounting surface to lock the nut securely in place, providing threaded holes for mounting servers, switches, power strips, and other rack-mount equipment.

How They Work

• The nut is inserted into a square hole from the front of the rack

• Spring wings compress as they pass through the hole

• Once through, the wings expand and lock the nut against the rear surface

• The nut remains stationary during bolt insertion, eliminating the need for a wrench behind the rack

• Can be installed by hand or with pliers for easier positioning

Applicable Standards

• EIA-310 (Rack mounting specifications)

• DIN 41494 (Equipment mounting interfaces)

• IEC 60297 (Mechanical structures for electronic equipment)

• GR-63-CORE (NEBS requirements for telecommunications)

Materials

• Cage Nut: Spring steel / carbon steel (heat-treated for spring tension)

Surface Finishes

• Zinc plating (clear or yellow)

• Black oxide

• Plain (with anti-rust oil)

Available Thread Sizes

• Metric: M4, M5, M6 (most popular) , M8, M10, M12

• Inch: 10-24, 10-32, 12-24, 1/4-20, and others available upon request

Common Applications

• Server racks and data center cabinets

• Telecommunications equipment enclosures

• Network switches and patch panels

• Audio/video equipment racks

• Industrial control panels

• Laboratory and testing equipment mounting

M6 rack mount screw kit is ideal for mounting servers, shelves, audio/video equipment, and other devices in standard square-hole server racks and cabinets. Universally compatible with all square-hole racks conforming to EIA-310 and DIN 41494 standards, this convenient kit provides everything you need for quick and reliable equipment installation.