The DIN 980V All Metal Prevailing Torque Type Hex Lock Nut is a one-piece, all-metal fastener designed to prevent loosening due to vibrations and shocks. Its conical top features chamfered corners, and the resistance to loosening is achieved through distortion in the top threads. These lock nuts can only be installed one way (top up) and are reusable. They come in various sizes (M6 to M20) and materials, including stainless steel.
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