Is required in place of traditional hex nuts for reduced weight or applications requiring lower torques, but form their own thread on a smooth die cast, mild steel or plastic stud. The interference caused by the nut and stud creates a strong locking force that prevents disassembly. Integral washer accommodates a larger mating hole to compensate for component build variation. One-piece design eliminates the need for multiple small parts, reducing inventory space. A seal can be added to prevent noise and water intrusion. Torque limiting feature to protect panels during installation. Internal drive feature that reduces the installation tool size and space needed to effectively fasten the part.