I found this object along a rock wall that the Civilian Conservation Corspe built back in the 1930's. It stands about 2 inches tall. It would almost appear to be an electrode for something. There's a course thread on the shank, therefore, it screws into something. The end of the shank appears to be brass, the main body appears to be pot metal. There's a spring with a flip up lid on top of the main body. Could it be something for blasting dynamite? The rock wall was built on a hill side, so it's possible they had to do some blasting. Thanks for any clues!