The PEL-LOC employs a nylon pellet positioned at the center of the nut, which is critical to its light-friction locking feature. This pellet extends throughout the wall of this two-way nut, creating the necessary frictional thread interference to lock the nut. The PEL-LOC is available in 1, 2, and 3 pellet configurations in a choice of American Standard and Metric; hex-finished, jam, heavy, hi, square, acorn, and flange nuts.