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 49 Maintenance and Repair Shop Equipment is a popular FSG. We stock parts under FSG 49 and the following FSCs:

• FSC 4910 Motor Vehicle Maintenance And Repair Shop Specialized Equipment
• FSC 4920 Aircraft Maintenance And Repair Shop Specialized Equipment
• FSC 4921 Torpedo Maintenance Repair And Checkout Specialized Equipment
• FSC 4923 Depth Charges And Underwater Mines Maintenance Repair And Checkout Specialized Equipment
• FSC 4925 Ammunition Maintenance Repair And Checkout Specialized Equipment
• FSC 4927 Rocket Maintenance Repair And Checkout Specialized Equipment
• FSC 4930 Lubrication And Fuel Dispensing Equipment
• FSC 4931 Fire Control Maintenance And Repair Shop Specialized Equipment
• FSC 4933 Weapons Maintenance And Repair Shop Specialized Equipment
• FSC 4935 Guided Missile Maintenance Repair And Checkout Specialized Equipment
• FSC 4940 Miscellaneous Maintenance And Repair Shop Specialized Equipment
• FSC 4960 Space Vehicle Maintenance Repair And Checkout Specialized Equipment
• FSC 4970 Multiple Guided Weapons Specialized Maintenance And Repair Shop Equipment