What is this spike for/from?

[Skyco]

That is the jiggle valve pintle from a turboencabulator mastronic. It is used to regulate the steam pressure fed to the spriget rotator.
BTW Area 51 is offering a huge reward for its return! The reward is double if he also has the gold anodized cavitron used to modify the transreactance omega.

 

[N80]

It is used to regulate the steam pressure fed to the spriget rotator.

Well, to be precise it us used to regulate the pressure to the spriget rotater spline.

 

[Skyco]

Dang it- I always forget about the spline Of course with an out of spec spline the transreactance omega can cross hypermodulate.