Unknown

[Woodland Detectors]

I found this interesting piece and have no idea what it is. The center on the top seems to be of a red Kevlar looking material. what is it?

 

[relichunters]

First thing that came to mind is a button, but I dunno

 

[detector de metales]

shank to a button?
j2

 

[doublet2a]

Looks like a one way valve from inside a pump.
I used to rebuild diesel vacuum pumps, and it looks just like that
Same size too. There would be 2 of them inside, one placed one way, and the other placed the opposite way
Hope that makes sense. should be a little spring inside, and the red piece made the seal depending on which way the air was going in the pump

Tim

 

[stefen]

Recall seeing similar devices on water faucets...

 

[DigEmAll]

I believe you have a check-valve. Allows one-way flow of a gas or liquid through a line.