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Bard part number 164-502 is an OEM channel style support piece used inside certain Bard wall mount HVAC cabinets to help brace, align, or separate internal components so the unit stays tight, square, and free of vibration during operation. When an internal channel is bent, corroded, or missing after a repair, replacing it with the correct Bard factory part helps restore proper component positioning and reduces the chance of rubbing, rattles, and premature wear on nearby assemblies. Because this is a fit critical internal sheet metal item, confirm the exact model and serial number from the unit nameplate and match it to the Bard parts list before ordering to ensure compatibility with your specific wall mounted unit configuration.