Quastinet was named by the U.S. Navy after Quastinet, a river in Massachusetts.
Quastinet, sponsored by Mrs. E.S. Chappelear, was laid down 2 August 1944 as MC hull 1802 by East Coast Shipyard, Inc., Bayonne, New Jersey. Constructed and converted concurrently, the vessel was launched on 24 September 1944. Acquired by the Navy from the Maritime Commission on 28 October 1944, the ship was commissioned on 6 November 1944.
Following shakedown, Quastinet reported for duty to Commander, Service Force, Atlantic, 28 January 1945.
Following assignment to the 12th Naval District, Quastinet was decommissioned 16 April 1946 and struck from the Naval Vessel Register on 21 May. She was transferred to the Maritime Commission on 9 September 1946.