For parts that are fastened together and endure constant vibration, fasteners may lose grip over time. What’s the solution? A thread locking patch applied to the screw. A thread locking patch is a simple concept. The threaded area of the screw is treated with a dot of nylon, or a layer that wraps completely around it. The patch increases the prevailing torque and provides excellent vibration resistance, allowing the screw to be locked in any position when assembled. Nylon-patched screws will maintain their grip even under conditions of constant vibration and low-level heat, making them especially popular with the automotive and aerospace industries.