A fastener probe assembly includes a disc configured to rotate about a first axis of a fastener, an ultrasound probe coupled to the disc, and an encoder configured to determine an orientation of the ultrasound probe relative to the first axis of the fastener during an inspection of the fastener. The ultrasound probe is configured to interface with an axial end of the fastener, to emit ultrasound signals into the axial end of the fastener, and to receive ultrasound signals from the fastener.