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Tungsten Disulfide (WS₂) Powders
Function: WS₂ is one of the slickest known materials (friction coefficient ≈ 0.03, lower than PTFE).
Advantage: It remains stable under extreme pressure and temperature—a legacy from its use in military-grade and aerospace lubrication systems.
Result: Prevents galling, wear, and deformation of nut slot surfaces over time.