NEWS
When the friction of fasteners is high, failure imminent, which cause issues such as loosening, galling or early wear, or something catastrophic, like bolt shearing. Therefore, dry film lubricants like graphite are required indeed when vibrations of fasteners are intense, dynamic loads are high.
The structure of carbon graphite is a layered lattice, a hexagonal form with strong covalent bonds. In a common air atmosphere condition, where metal fasteners are similar material, lubrication can be exceptional. When nut and bolt are dissimilar metal, an electrical potential exists, then MoS2 or WS2 are better suited. Because graphite can affect stimulating galvanic corrosion.
When you suffer from failure of your fasteners again, or design with nuts and bolts next time, you can use graphite low friction coatings.