MIL-HDBK-1655, DEPARTMENT OF DEFENSE HANDBOOK: CLASSIFICATION OF DEFECTS OF FLARELESS AND BEAM SEAL FITTINGS (17 MAR 1997) [SUPERSEDES MIL-STD-1655]., This handbook establishes a classification of commonly occurring defects applicable to flareless fittings and beam seal fittings specified in military specifications MIL-F-18280, MIL-F-85421, MIL-F-85720, and DoD adopted non-Government standards.