Lantern part? Musket part? Other? Please help..

[history preserved]

So I found this today at an 1830's fort. It is solid brass, and was very deep. At first I thought it was a drawer pull, until I saw the Reeded edge. Any ideas on what it is?

 

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[nhbenz]

Possibly the adjustment wheel from an old wood plane?

 

[BosnMate]

Not gun related.

 

[4x4x4]

....Thumb nut from a chart/map divider ?
...."......."......"......."......" sextant ?
An adjustment nut....has a wide land at base providing an adjustable and repeatable friction point.

 

[sutphin]

A KNOB TO A PIANO

 

[Bruce R]

I had an old surveyors transit tripod that had knobs just like that on all the adjustments.