I'm attempting to build a crow that can stay upright even when its perch tilts. For that I need to have some single axis hinges (not u-joints). I'm using 3mm rod for my internal supports and am hoping to find some light weight hinges that are sized appropriately and can take a lot of duty cycles and still remain fairly friction free.
I've included an image of one I'm thinking of but I can't for the life of me find the name of it. Does anyone knew the name so I can find one on amazon or McMaster Carr? (I could make them myself, but time is short and I have plenty of others things to do first)
Is there a better choice?