15-192 is a hexagon locknut designed for mounting one-hole toggle switches. It features a 15/32-32 thread size and is constructed from zinc-chromate treated material for corrosion resistance. The locknut has a thickness of 0.075 inches (1.91 mm) and an OD or dimension across flats of 0.625 inches (15.88 mm). This mounting hardware is intended for use with Eaton switches, providing secure panel mounting and preventing bushing sleeve distortion when properly installed with backup nuts.