Gibraltar Pro Hi-Hat Clutch - Fits Gibraltar and most professional stands. (8mm rods) Perfect as a replacement or spare part for hi hat stands with an 8mm pull rod. Features a lock nut which is adjustable with a standard drum key to lock the bottom nut in place so it won't unscrew when playing.
Your hi hat stand needs a clutch and they are just the sort of thing that get lost at gigs, get left behind in studios ..... etc. Keeping a spare or 2 in your repair kit is a great plan