Whats the nut for on swag and clone valves?

[Slabby]

Im talking about the black handle ones. What is the nut for under the handle that screws up and down.

[Curious_Roberto]

Isn’t that for mounting to a panel?

[StoneD]

Tighten the packing maybe? Pics?

[cannabuilder]

Nailed it

[Slabby]

Huh? Am i retarded cuz i know those words but that makes no sense to me. What panel would these mount on?
Edit just had to think:
Like where only the handle shows on one side and is held on sandwiched with that nut onto a panel? That makes sense.

Thanks i was wondering that for years lol. Im a dumb ass sometimes lol

[Slabby]

Curious miner has the pic and the nut is circled.

[cyclopath]

I’ve also used them to attach labels.

Only picture I’ve got was done with a canning jar lid. It’s around here twice already…