An information handling system coupling device inserts into an opening of first and second portions that overlap to couple the portions together, such as a main housing and hinge, a lid housing and hinge, and a tray disposed in a main housing interior. First and second magnetic elements insert into the opening with like poles aligned to repel each other and provide room to fit a third magnetic element between them having opposing poles to attract the first and second elements into an assembly. Protrusions, such as an I-shape, extend from the assembly into recesses of the opening to engage the coupling device in place within the opening.