The Hatco 02.05.002.00 cartridge heater is a compact electric heating element measuring 5-5/8 inches in length and equipped with electrical terminals and 3/8-inch FPT by 1/2-inch MPT threaded connections for secure installation. It works by converting electrical energy into heat as current passes through the internal resistance element, delivering focused heat to the surrounding component or fluid. This design supports efficient heat transfer within confined spaces. Benefits include dependable heating output, secure threaded mounting, straightforward replacement, and durable construction suited for routine commercial use, making it a practical component for maintaining consistent equipment operation.