Raymond H. Hays Sr., 80, a retired civilian employe of the Navy Department, died Saturday at Doctor's Hospital of Prince George's County in Lanham. He had a stomach tumor.

Mr. Hays was born in Baltimore and moved to Prince George's County 65 years ago. He joined the National Bureau of Standards in 1918, where he worked for 15 years as an optical machinist and instrument maker.

He joined the Washington Navy Yard in 1933 and was promoted from machinist to Leading Man during World War II. During the war, he worked on optical range finders and sighting devices for Navy 5-inch guns. He retired in 1956 for reasons of health.

He was a member of Columbia Lodge No. 174 of the International Association of Machinists and Aerospace Workers.

Mr. Hays had belonged to both the Mount Rainier and Glenn Dale volunteer fire departments.

He is survived by his wife of 57 years, Emily Cornelia, of the home in Lanham; three daughters, Anna Charnock, of Upper Marlboro, May Doyle, of Camp Springs, and Dorothy Crotty, of Mitchellville, Md.; a son, Navy Cmdr. Raymond H. Jr., of Lanham; two brothers, James C. and John L., both of Bradenton, Fla; 14 grandchildren, and six great-grandchildren. CAPTION: Picture, RAYMOND H. HAYS SR.