Honeywell THM04R3000 Equipment Interface Module 326058-758 which is the specific standard

which is the specific standard for most terminal unit locking screws and calibration ports

Corrosion Resistance: Heavy-duty stainless steel construction prevents premature float failure in harsh chemical environments

Direct OEM Replacement: Eliminates field modifications

While the 18-inch length provides flexibility

Honeywell THM04R3000 Equipment Interface Module 326058-758 which is the specific standardThe Honeywell THM04R3000 Equipment Interface Module (EIM) is designed for use with T10+ smart thermostats, providing a reliable connection point between the thermostat and HVAC equipment. It is commonly used in applications where additional wiring flexibility is needed or when installing systems without a common wire at the thermostat location. This equipment interface module simplifies installation by relocating wiring connections from the thermostat