Replica Michell part used as greeblies on Boba Fett's boots and knees, supertrooper blaster, R2 zapper arm, ATAT driver helmet, maybe on the Jabba gate keeper droid, although they might look a bit more pointy on the droid. And probably in a lot of other places!
approx 12.3mm diameter, 31.5mm long aluminium part. M4 threaded hole on the side, M5 on the bottom.