Isn't That Stud Supposed to be on Top ? No, it's SNOT - Building Sideways using LEGO - Towering Brick Creations
Basic dimensions of LEGO® toy bricks [20] | Download Scientific Diagram
What is the interference lock offset of a LEGO stud/hole such that it fits snugly into another piece? (i.e. What are the snap mechanism dimensions?) - Quora
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Basic dimensions of LEGO® toy bricks [20] | Download Scientific Diagram