A folding hinge comprising a first hinge leaf plate having knuckles and mounting holes for receiving mounting fasteners, a second hinge leaf plate having knuckles and rack mounting pins, a hinge barrel which is formed by the knuckles from each leaf plate, and a hinge pin to join and secure the two leaf plates together to form a completed hinge for use in hanging or mounting doors, screens, panels, or other types of covers to storage racks and storage rack systems.

A system includes a hinge-arm with a clevis end and a pin non-rotatably coupled to a first arm of the clevis end. The pin has a first portion with an outer diameter and a reduced width midsection. A mounting bracket, configurable to couple to a device, receives the pin to enable rotation of a cover coupled to the hinge-arm. The mounting bracket comprises a slot for the reduced width midsection and a joint portion with a diameter corresponding to the pin's outer diameter. The pin is removable when the hinge-arm is rotated to a particular angle range, allowing the reduced width midsection to enter the slot. At angles outside this range, the pin is retained by interference between its outer diameter and the joint portion. This system enables secure attachment and easy removal of access panels in various equipment.