The ROMIX 12623 Speed Nut is a self-locking and self-aligning nylon drive nut. It has a nut shape with threads in the center and two outer lobes that allow the nut to create a tight fit in the sheet material it is fastened to, making it ideal for electrical installations and other applications. The nut is made from durable, high-impact nylon and has a flange that helps to ensure a secure lock onto the material. The ROMIX 12623 is designed to work with thick material, such as metal sheets, and is RoHS compliant.