FED-STD-346C, FEDERAL STANDARD: GAGES, WRENCH OPENINGS (12 MAR 1974) [S/S BY ANSI/ASME B107.17]
FED-STD-346C, FEDERAL STANDARD: GAGES, WRENCH OPENINGS (12 MAR 1974) [S/S BY ANSI/ASME B107.17]., This Federal standard establishes the sizes for gages for wrench openings in items procured by the Federal Government.