| Navy | The US Navy |
| Type | Motor torpedo boat |
| Class | ELCO 80' |
| Pennant | |
| Built by | Electric Launch Company Ltd. (Elco), (Bayonne, New Jersey, U.S.A.) |
| Ordered | 27 Apr 1943 |
| Laid down | 15 Nov 1943 |
| Launched | 8 Feb 1944 |
| Commissioned | 11 Mar 1944 |
| End service | 7 Apr 1945 |
| History | Transferred to the Soviet Union on 7 April 1945 being renamed TK 441. |
| Career notes | To the Soviet Union as TK 441 |
We don't have any commands listed for USS PT 521
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