What is this?

[CarpCharacin]

is it part of a momentary switch ?

Nope.

 

[OhZark Biddies]

No.

Here is a picture with a pencil for scale.
View attachment 1694359

when in use, does the thinner part stick out, or the wider part?

 

[CarpCharacin]

when in use, does the thinner part stick out, or the wider part?

The wider part, but it fits into something else with a bunch of other identical metal pieces, which then screws into something else.

 

[Molpet]

The wider part, but it fits into something else with a bunch of other identical metal pieces, which then screws into something else.

Terminal strip?

 

[WVduckchick]

Does it go in a flashlight?

 

[CarpCharacin]

Terminal strip?

No.

 

[CarpCharacin]

Does it go in a flashlight?

No.

 

[duluthralphie]

No.

Is it a birth control pill?

 

[CarpCharacin]

Is it a birth control pill?

No, it's made out of metal.

 

[casportpony]

Nope, it's too small.

What are the dimensions?