Many users appreciate how Zaplyte relays fit standard sockets without any wobble or wiggle.
GE 12HFA151A2F Auxiliary Relay 125 Volts DC/CY Type HFA No Cover
What stands out about this relay is that it comes from the reputable manufacturer Deltrol.
The G3P-210B keeps things manageable in my shop, since the part number is unambiguous and easy to log.