These are the larger knobs on the front panel. They fit: Speaker, Balance, Volume, Mode, and Source Selector switches. All set screws are in knobs..none missing 

Also will fit TU-999…Selector switch and tuning function.

Came from a unit that was DOA. Your bonus here is the part you need.

No refunds or returns on electronics parts. So be sure this fits your Sansui before you pay. Thanks..

Another Offering From, Gary….sansuioldaudiophile