A federal grand jury in Baltimore yesterday indicted five more managers or assistant managers of General Services Administration centers that provide government workers with office supplies.

The indictments, announced by U.S. Attorney Russell T. Baker Jr., allege that GSA employes received a color television set, jewelry, furniture, a freezer, auto tires, a microwave oven, and other items from office supply firms in return for certifying that the firms supplied merchandise that never was received.

The grand jury also indicted a Health, Education, and Welfare Department employe for allegedly participating in the fraudulent scheme.

The indictments followed the pattern of 26 previous indictments handed down in Balitmore against GSA supply sotre managers and government workers who patronize the centers. They bring to 38 the number of individuals charged in continuing investigations of corruption within GSA. Of this number, 25 persons have pleaded guilty.

A concurrent investigation by the U.S. attorney's office in Washington has charged six repair and painting contractors with defrauding the government by paying millions of dollars in bribes to GSA building managers for certifying that the contractors performed repair work they never did in federal buidlings. All six have pleaded guilty.

GSA office supply centers are located in federal buildings. Federal workers select office supplies arranged on shelves and place them in shopping carts. The items are then charged by GSA to the accounts of the various government agencies that receive the supplies.

The supply centers have been under investigation for more than a year by a team of FBI agents and GSA investigators under the direction of U.S. Attorney Baker.

Those indicted yesterday were:

Charles J. Allen, 35, of Springfield, Va., who was manager of a GSA store at the Nassif Building in Washington; Manuel M. Cumes, 32, of Springfield, who is manager of the same store at Nassif; Samuel L. Irick, 37, of Upper Marlboro, who is manager of the GSA store in Hyattsville; Al Allen, 36, of Washington, who is assistant manager of the GSA store at the Parklawn Building in Rockville; Melvin K. Davis, 40, of Washington, who is an assistant manager of the same store, and Vincent W. Miller Jr., 46, of Alexandria, a procurement officer in HEW's Health Services and Mental Health Administration.

They all were charged with five to 14 counts of conspiracy to defraud the government, bribery, and other crimes. The charges carry maximum penalties of 15 years in jail and a $10,000 fine.

Also contributing to this story was Washington Post special correspondent Chris Schauble .