The ESCO Skirt Nut is an aftermarket replacement for common wheel attaching nuts on hub-piloted wheels. It has an extended threading design that allows it to enter the hub-piloted disk wheel a 3/16-in. farther than the stud hole to stop vibration and conditions that cause loose wheels. The nut is coated in graphite-based sealant to prevent rusting. It replaces 22-mm by 1.5-mm flange nuts.