Modern electric vehicle (EV) cooling fluids and biofuels attack standard hexavalent chromium passivation. The exclusive X02 sealant is engineered to resist formic acid and modern glycol mixtures, making DIN 509E06X02 exclusive a preferred code in EV battery tray fasteners.

: This term is likely a marketing or inventory label from a specific supplier or a project-specific instruction, indicating that this exact specification must be used exclusively to ensure compatibility with mating bearings or seals. Machining Guidance Din 509-2006 PDF | PDF | Machining | Engineering - Scribd