Frederick Ernest Rest Sr., 67, who was a sheet metal worker in the Washington area for many years, died of cardiac arrest Sunday at his home in Jackson Creek near Kinsale, Va. He moved there five years ago after living for 28 years in Cabin John.

Mr. Rest was born in Washington. From 1940 to 1948, he worked at the Norfolk Navy Shipyard. He then returned here worked at the Washington Navy Yard and for a number of sheet metal firms, including Gischner's, Hamilton and Spiegel and the Bethesda Sheet Metal Co. Mr. Rest, who was a member of Sheet Metal Workers Local 102, retired five years ago.

Survivors include his wife, Mary Agnes, of Jackson Creek; three sons, Frederick Ernest II, of Potomac, Edward Francis, of Kinsale, and Joseph Frederick, of Bristol, Tenn.; two daughters, Margaret Mary Worley of Bristol, and Ann Marie Hyder of Ragged Point Beach, Va.; a brother, John Edward of Chesapeake, Va.; five sisters, Eleanor Lowe and Dorothy Barefoot, both of Glen Echo Heights, Catherine Anthony of Fort Sumner, Md., Rose Marie Fyock of Rockville, and Frances Williford of Ocean View, Va.; a half-brother, Harry R. Mills of Silver Spring; 10 grandchildren, and one great-grandchild.