CTS 250k Split Shaft Pots (or Solid Shaft) and 500k split shaft pots come with nut, flat washer, 3 locking washers (cryogenically treated)
This pot is a high quality audio taper potentiometer with +/- 10% tolerance.
All new pots have a grease installed at the factory that makes the pot very smooth feeling, but it does cause drag. If you do a lot of volume swells and want the pot to move quickly, removing this grease frees the pots up considerably. Just open it up and wipe out the grease and clean it up spotless. If you really know what you are doing you also reduce the spring pressure of the wipers.