How about the Snapstud? Found in the centre of many parts and are used to make turntables of many different sizes.
Top parts: 60474, 87081, 68325, 11213, 74611, 89523, 35442, 35443, 35446
Bottom parts: 27488, 61485, 65146
Top parts: 60474, 87081, 68325, 11213, 74611, 89523, 35442, 35443, 35446
Bottom parts: 27488, 61485, 65146