A spring nut is a type of channel nut with a built-in spring that allows it to be inserted into a strut channel, providing a temporary "third hand" that holds the nut in place, preventing it from falling out while you attach a fitting or bracket to the channel. The spring takes up the slack, keeping the nut flush against the channel's inturned edges. Its serrated or grooved edges grip the inside of the channel, ensuring stability. Spring nuts are used in construction, mechanical engineering, and the automotive industry to flexibly mount pipes, electrical fixtures, support structures, and other components to strut channels.