The first two digits of the National Stock Number are the numbers that identify the Federal Supply Group. We always want to be sure that we have a wide range of inventory to deliver to our customers the supplies they need at all times. This requires having an expansive supply of different National Stock Number parts and Federal Supply Codes.
The FSG number 20 is designated for the group consisting of Ship and Marine Equipment. This is the group that encompasses all products, items and equipment used in vessels that operate in the water.
The specific categories within this particular Federal Supply Group are:
Some of the vessels that these parts might be ordered for are military ships and submarines, marine corps ships, coast guard cutters and boats, carriers, submarines, destroyers, special mission ships and submarines, amphibious ships, special operations ships, attack submarines, ballistic missile submarines, command ships, cruisers, frigates, and many more.