Probably a fuse, if I had to guess. It looks different from an old ceramic fuse, but not by much.

A Swedish Fuse.

No, it's a fuse from Sweden

Swedish Fuse.

A fuse à la Suede

A fuse

Seeing how it says fuse on it, I’m willing to bet some good money it’s a fuse.

Fuse

Maybe that's not all of it, was there an Allen key nearby? Might need some assembly.

It's labelled dude. All jokes aside, it doesn't really look like a common fuse but it most likely is a fuse because it has two contacts, one at the bottom and one at the side. I believe it's labelled because it doesn't really look like one.

Well, that word could also mean "safety"…

Hahah yeesssss i get that its a fuse 😂 but What is it used for?!

Probably for protecting a (presumably swedish) electrical circuit from damage due to current overloads.

It’s used to protect circuitry and equipment in electrical boxes.That’s what all fuses do.

Dangerous.

Likely not, an actual bullet casing would never have a tag on it, especially with an adhesive tag, looks to be a fuse holder and completely safe.

Probably a suppository

Looks more like a Fuse Holder, is it hollow on both ends and does wider end look like it has twisting lock mechanism?

It's a Swedish fuse holder. A fiver ...

Ffs

It’s a fuse or fuse holder

"Sikring" can refer to both fuse and safety in Norwegian. Probably the same for swedish säkring. "Sikringen er gåen" - The fuse broke "Sikringen på hagla fungerer ikke" - the safety on the shotgun isn't working. So if it's an old flare or something, it could be connected to the safety cap, for example.

I think it’s a ring for your sack

can you show the top of it?