FREE search for military standards and specifications but you must register for access to the site.
Bell Helicopter Training Academy
Connector and Cable Maintenance Course.
Defense Logistics Information Service
FREE CAGE Code search.
Edwards Publishing Co., Inc.
Encyclopedia of Connectors.
Global Engineering Documents
Fee based search for technical standards and specifications.
NEMA - National Electrical Manufacturers Association
Fee based search for standards and specifications covering electrical devices.
SAE - Society of Automotive Engineers
Fee based search for standards and specifications covering aerospace components.
The Aviation Zone
Comprehensive online resource for military transport aircraft.