A retention assembly for interconnecting rotating components in a gas turbine engine , comprising: a first rotating component defining a central rotation axis ; a second rotating component rotatable about the central rotation axis , the second rotating component including an engagement portion defining protrusions circumferentially spaced apart and extending axially from the second rotating component ; a threaded fastener axially retaining the second rotating component to the first rotating component , the threaded fastener having key-receiving slots circumferentially spaced apart and extending radially into an outer circumferential surface of the threaded fastener , and a groove extending circumferentially about the threaded fastener within the outer circumferential surface ; a key washer mounted to the threaded fastener , the key washer being annular and defining a first axial surface and a second axial surface axially spaced apart from each other, the key washer having a first set of keys circumferentially spaced apart and extending radially inwardly from a radially inner surface of the key washer adjacent the first axial surface of the key washer , the key washer having a second set of keys circumferentially spaced apart and extending axially from the second axial surface of the key washer , the first set of keys received within the key-receiving slots in the threaded fastener ; and a retaining ring disposed within the groove in the threaded fastener , the retaining ring radially retained by the protrusions extending axially from the second rotating component , the retaining ring axially retained between the second set of keys and the second axial surface of the key washer , the retaining ring radially spaced apart from the second set of keys of the key washer to define a radial gap between the second set of keys and the retaining ring . a first rotating component defining a central rotation axis ; a second rotating component rotatable about the central rotation axis , the second rotating component including an engagement portion defining protrusions circumferentially spaced apart and extending axially from the second rotating component ; a threaded fastener axially retaining the second rotating component to the first rotating component , the threaded fastener having key-receiving slots circumferentially spaced apart and extending radially into an outer circumferential surface of the threaded fastener , and a groove extending circumferentially about the threaded fastener within the outer circumferential surface ; a key washer mounted to the threaded fastener , the key washer being annular and defining a first axial surface and a second axial surface axially spaced apart from each other, the key washer having a first set of keys circumferentially spaced apart and extending radially inwardly from a radially inner surface of the key washer adjacent the first axial surface of the key washer , the key washer having a second set of keys circumferentially spaced apart and extending axially from the second axial surface of the key washer , the first set of keys received within the key-receiving slots in the threaded fastener ; and a retaining ring disposed within the groove in the threaded fastener , the retaining ring radially retained by the protrusions extending axially from the second rotating component , the retaining ring axially retained between the second set of keys and the second axial surface of the key washer , the retaining ring radially spaced apart from the second set of keys of the key washer to define a radial gap between the second set of keys and the retaining ring . <EOS>