This device is a 9 mm. rotary linear 20K PCB vertical mount ½ Watt potentiometer with plastic knurled 12.5mm slotted shaft.
Characteristics:
PCB Mount
 Width                           9mm
 Shaft Length               12.5mm  
Shaft Diameter            6mm
Pitch                            2.5mm
Value                           2K Ω
Tolerance                    20%

 
    
             
 
 
 
 
  
 