I'm trying to find a type of fixing whose name I don't know.
It's something like a bolt but it's not threaded. It has a head like a bolt and it can be pushed through a hole like a bolt but that's when the difference from a bolt emerges. Once pushed through the hole one can release a 'toggle' from the middle of the bolt to prevent it from sliding out again.
I.e. it's a bit like a clevis pin but with the function of the R-clip or split-pin built into the clevis pin.
Does anyone know what they're called?