This electronic part, identified as 2 555 3434 01 with Extension, is manufactured by Hummel and has both external and internal threads of G 3/4". It is a small control element with an integrated circuit in which a number of resistors, capacitors, and diodes are installed to perform a variety of functions such as timing, pulse width modulation, and voltage control. The part is suitable for use in a wide range of industrial and consumer applications including medical instruments, HVAC systems, home automation, and automotive control.