K&M Thumbwheel Alu

I find that these grip better than the lock nuts supplied with some cheap microphone stands. They are aluminium rather than steel, so they will show a little damage to the knurling if gripped forcefully with pliers (when you need a setup that is definitely not going to twist out of position), but it is better that they do the job rather than just look pretty. Note that they are 3/8" standard rather than 5/8".