nsn example number
Deciphering a National Stock Number (NSN) The NSN is a 13-digit code, such as 8010-01-380-2362. This real example is for MIL-DTL-24441 epoxy-coating kit Formula 150 Type IV in a 2-gallon kit. The first four digits of the NSN are known as the Federal Supply Classification (FSC). Each FSC code is derived from the Federal Supply Groups (FSG).