A GI spring nut is a type of fastener used in construction and industrial applications to secure objects, typically threaded rods or bolts, to metal framing or channels. The term "GI" stands for Galvanized Iron, which means that the spring nut is made from steel coated with a layer of zinc through galvanization to protect it from corrosion.

The GI spring nut is designed with a unique spring-like feature that allows it to slide easily along metal channels or framing while still providing a secure grip. This design enables quick and efficient installation without the need for additional tools. When the nut is placed onto the channel, the spring action allows it to grip firmly in place when released, holding the threaded rod or bolt securely in position.

These spring nuts are commonly used in various applications, including installing electrical conduits, cable trays, ductwork, and other fixtures onto metal supports or framing. The galvanized coating provides added durability and resistance to corrosion, making the GI spring nut suitable for both indoor and outdoor use.