A cable connector system that comprises a first contact assembly that includes a housing and a first contact received in the housing, where the first contact has a cable termination portion and an interface portion that includes a first contact surface and a cap that has a first locking surface. A second contact assembly mates with the first contact assembly and includes a housing and a second contact that has a second contact surface configured to engage the first contact surface and the second contact being rotatable with respect to the first contact. A locking member that includes a second locking surface is configured to engage the first locking surface, wherein when the second locking surface engages the first locking surface, the first contact assembly is prevented from moving axially with respect to the second contact assembly while the first contact remains rotatable with the second contact.