Metal-to-metal contact is controlled by proper viscosity selection and use of film-forming compounds.

Self-locking, self-sealing and reusable element, Permanently embedded in the threads of a fastener, Strong metal-to-metal contact and positive resistance to vibration and loosening.

For example, if the force operating on a sleeve bearing becomes too high, it will squeeze out the oil film and cause metal-to-metal contact, overheating and rapid failure of the bearing.