The U.S. Department of Defense created the National Stock Number system in order to create a uniform naming system for all the components that are sourced, stocked, and procured within the federal supply system. NSNs are 13 digit serial numbers that classify and describe an item. Within the NSN are the smaller classification numbers, Federal Supply Group, Federal Supply Class, country code, and National Item Identification Number. Typically in the format, XXXX-XX-XXXXXXX, the first two digits of the NSN are the Federal Supply Group. The following two digits are the Federal Supply Class. The FSG and the FSC can be referenced in the Department of Defense’s H2 handbook. FSG 58 Communications Detection and Coherent Radiation is a popular FSG. We stock parts under FSG 58 and the following FSCs:

• FSC 5805 Telephone And Telegraph Equipment
• FSC 5810 Communications Security Equipment And Components
• FSC 5815 Teletype And Facsimile Equipment
• FSC 5820 Radio And Television Communication Equipment Except Airborne
• FSC 5821 Radio And Television Communication Equipment Airborne
• FSC 5825 Radio Navigation Equipment Except Airborne
• FSC 5826 Radio Navigation Equipment Airborne
• FSC 5830 Intercommunication And Public Address Systems Except Airborne
• FSC 5831 Intercommunication And Public Address Systems Airborne
• FSC 5835 Sound Recording And Reproducing Equipment
• FSC 5836 Video Recording And Reproducing Equipment
• FSC 5840 Radar Equipment Except Airborne
• FSC 5841 Radar Equipment Airborne
• FSC 5845 Underwater Sound Equipment
• FSC 5850 Visible And Invisible Light Communication Equipment
• FSC 5855 Night Vision Equipment Emitted And Reflected Radiation
• FSC 5860 Stimulated Coherent Radiation Devices Components And Accessories
• FSC 5865 Electronic Countermeasures Counter Countermeasures And Quick Reaction Capability Equipment
• FSC 5895 Miscellaneous Communication Equipment