monitoring internal heat exchanger temperatures to prevent hazardous overheating

Can I use this as a substitute for a generic 2-pole contactor

Is mounting hardware included with the cover

this motor is a critical component for restoring system head pressure

and Arizona

Lochinvar & A.O. Smith 100187859 Switch 318172-701 monitoring internal heat exchanger temperaturesThe Lochinvar & A. O. Smith 100187859 Switch is a critical 2. 0" blocked outlet switch designed for high efficiency gas fired commercial water heaters and boilers. As a genuine OEM replacement part, this pressure switch is calibrated to detect vent obstructions, ensuring the system shuts down safely if exhaust gases cannot be properly expelled. It is commonly utilized in A. O. Smith Cyclone BTH 300A series and comparable Lochinvar Power Fin models.