Hosco 3/8" Mounting Nuts for Imperial CTS Potentiometers and Switchcraft Jack Sockets are handy spares for lost or damaged parts but particularly useful if you want to mount an extra nut to a potentiometer to set the knob height. By mounting a nut on to the pot before it is mounted to the pickguard or through the rear cavity you can set the amount of the pot shaft that shows above the surface and therefore the height of the knob above the guitar body (great when using regular length pot shafts with thin pickguards or long length pots with carved tops).