Brass Disk needing an I.D./Possibly artillery related??

[Ripcon]

I found this solid brass disk yesterday at a civil war skirmish site. It looks suspicious but I can't i.d. it.
I'm posting top, bottom and side views. Any ideas? Thanks!

 

[vhs07]

Part of an old gate valve

 

[TheCannonballGuy]

VHS07 is correct... it is an internal component from a (2oth-Century) water supply line gate-valve. I don't know the proper name for that component, perhaps "shutoff disc", but you can see it in the image below.

Giving credit... that image was originally posted here in What-Is-It? by our fellow ID-helper Taz42O.

 

[Reanm8er]

Shazam!

 

[Ripcon]

You all are amazing. I appreciate the correct i.d. on this piece.

 

[A2coins]

Boom lol great I D