What Lego set does this belong to? I want to find which LEGO set this unusual piece belongs to. I have 10? I have a few sets from the late 1980's and the rest are from the 1990's.  I have looked and looked. Hope you can help!



It looks like a 1 x 1 square brick with six studs extended 1/4". The studs have a square lip around it. The brick base has two studs and then there is a square with four studs that fits around it to make six!

The color seems to be closest to Medium Blue or Medium Azure
That isn't Lego, it's Construx by Fisher-Price. I had some of those :)

http://www.thisoldtoy.com/fisher-price/dept-7-playsets/f-construx/nuts.html