A wellhead hanger assembly is provided. In one embodiment, a system includes a wellhead hanger, a running tool coupled to the wellhead hanger, and a torque sleeve positioned to transmit torque from the running tool to the wellhead hanger. The running tool can be in castellated engagement with the torque sleeve via a first set of castellations and mating slots, and the wellhead hanger can be in castellated engagement with the torque sleeve via a second set of castellations and mating slots. Additional systems, devices, and methods are also disclosed.