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FSG 63 alarm signal and security detection systems

As an ISO 9001:2008 certified/ASA-100 accredited supplier, we at ASAP Semiconductor uphold the high federal standards of being a purveyor of parts to those who service the Aerospace, Aviation, Military and Defense industries. Purchasers can browse our extensive stock of both current and obsolete parts though our proprietary website ASAP Aerospace, where parts are catalogued by their respective, federally-assigned National Stock Numbers.

To ease the acquisition process, the U.S. Department of Defense created a system that distinctively and permanently identifies the items that it purchases. This system, termed the National Stock Number (NSN), consists 13 digits which are broken down into the 2 ensuing identifying subcategories :

  1. Federal Supply Classification Group - The first 4 digits of the NSN identifies the Federal Supply Class code (FSCG).
  2. National Item Identification Number - The last 9 digits of the NSN identifies the National Item Identification Number (NIIN). 

For example, an existing annunciator we supply at ASAP Semiconductor has a 13-digit NSN of 6340-00-022-3361. The FSCG is represented by 6340, and the NIIN by 000223361.

Continuing on, the FSCG and NIIN can be broken down even further into the following classifying subcategories :

  1. Federal Supply Group - The first 2 digits of the FSCG identifies the Federal Supply Group (FSG).
  2. Federal Supply Code - The last 2 digits of the FSCG identifies the Federal Supply Code (FSC).

    For the above annunciator, the FSG is represented by 63, and the FSC by 40.

  1. National Codification Bureau - The first 2 digits of the NIIN identifies the National Codification Bureau (NCB) or NATO country code.
  2. Item Serial Number - The last 7 digits of the NIIN is merely an item serial number that does not follow an assignment pattern.

For the above actuator assembly, the NCB is denoted by 00, USA’s country code.

One FSG we at ASAP Semiconductor stock is FSG 63 - Aircraft Alarm and Signal Systems. Manufacturers for FSG 63 that we carry include :