The HMIZHAT8W1 is a panel cutout adapter from the Schneider Electric Harmony P6 range. It lets you mount a 19-inch wide Harmony P6 display module into a panel cutout originally sized for a Harmony GTU (also 19 inches wide). If you're upgrading a GTU-based panel to a P6 HMI without re-cutting the sheet metal, this adapter is the part that saves you the fabrication work.
What it fits and where it goes
This is a mechanical adapter — no wiring, no electronics. It bridges the physical footprint difference between the GTU cutout geometry and the P6 display module's mounting flange. Install it between the panel cutout and the display bezel. The adapter is classified as an adaptation accessory (accessory / separate part category: adaptation accessory), so it ships as a single unit (1 per package) and carries no electrical ratings — the display module itself handles all that.