Wobbly shower knob

[lulu_duffle]

Anyone know how I can stop the screw loosening every time we use the shower please? Do I need a new screw, would PTFE tape work or would Loctite blue be an idea? Thanks.

 

[bilabonic]

What make/model.
Should there be a spacer between ’knob’ and main unit?
Screw should tighten fully without interference with the control knob.

Does tightening it fully affect operation of the knob?

 

[lulu_duffle]

Not sure on make or model. Might be a Hudson Reed. The screw screws into the end of one of these shower cartridges. There isn't a spacer but that's not to say there shouldn't be one. What would a spacer look like? It does fully tighten without interference with the control knob

 

[oldbuffer]

If the screw your are talking about is the one in the middle of the end of the knob and which secures the knob to the spindle then:
1. Put a shakeproof washer under the screw head. Make sure its stainless steel.
OR.
2. Put a dab of thread lock on the thread. Use a non-permanent one for when you want to remove it again.

 

[lulu_duffle]

If the screw your are talking about is the one in the middle of the end of the knob and which secures the knob to the spindle then:
1. Put a shakeproof washer under the screw head. Make sure its stainless steel.
OR.
2. Put a dab of thread lock on the thread. Use a non-permanent one for when you want to remove it again.

Thank you