MIL-STD-1554, MILITARY STANDARD: INSERT ARRANGEMENTS FOR MI1-C-83723 SERIES AND MIL-C-26500 ENVIRONMENT RESISTING, CIRCULAR, ELECTRICAL CONNECTORS (01 JUL 1975)., This standard covers insert arrangements use with MIL-C-83723 series 111 and MIL-C-26500 environment resisting,circular,electrical connectors.