U-nut

A U-nut is very similar to a J-nut except that both legs are the same length. Because of this a retaining clip is usually formed on the leg without the threads. This helps keep the nut in place while not screwed down. The thread may be of a speed nut style, integrated nut, or have an extruded portion that is tapped. There are "standard" and "wide-panel" versions; the standard version has a solid hinge section, whereas the wide-panel version has a longer hinge with the center section cut-away to allow for easier installation.