A rotational degree of freedom joint constraint system is disclosed. The system can include joint constraint hardware, such as a first component and a second component. The first component can have a rotational interface, and a constraint feature associated with the rotational interface. The second component can have a socket operable with the rotational interface to facilitate relative movement of the first component and the second component in at least one rotational degree of freedom. The second component can form an opening configured to facilitate movement of the constraint feature therein upon the relative movement of the first component and the second component. The rotational degree of freedom joint constraint system can also include a locking mechanism operable with the constraint feature. Movement of the constraint feature within the opening can be preventable by the locking mechanism to constrain the relative movement of the first component and the second component.