Allan Key or something different?

[Gordopolis]

What do I need to detach this hinge? Triedy smallest and second smallest Allan keys but they were too small and too big respectively

I'm not even sure an AK is the right thing for them.

Can anyone advise?

Cheers in advance!

 

[JohnD]

is it a metal doorframe?

steel or aluminium?

room door, cabinet, window, caravan?

 

[Stivino]

They look like pop rivets so, you can either drill the heads off them or, file the hinge pin flat at the top or bottom and then punch it out.
It all depends on why you want the door off.

 

[Gordopolis]

is it a metal doorframe?

steel or aluminium?

room door, cabinet, window, caravan?

Metal dog crate door

They look like pop rivets so, you can either drill the heads off them or, file the hinge pin flat at the top or bottom and then punch it out.
It all depends on why you want the door off.

Trying to reverse the door so it opens on the other side

 

[Stivino]

Trying to reverse the door so it opens on the other side

Carefully, using a big drill, drill the heads off the rivets, file the heads off the rivets, grind the heads off the rivets.

 

[JohnD]

Metal dog crate door

Trying to reverse the door so it opens on the other side

Then I agree with Stivino.

If you use a conical drill, like a countersinker, it will self centre and take the head off. Stop the moment the head starts to spin.

It looks like you could reassemble with small nuts and bolts. A DIY pop riveter will not do such a neat job.

 

[foxhole]

Drill out and refit with self tapping screws.

 

[big-all]

just a thought and probably not applicable
is it sectionally made as in disassemble the full end/side panel the door is in and flip it over 180%??
as i say worth a suggestion but small chance off it happening