Aviation Federal Supply Groups (FSG) and Classes (FSC) Start with Number 4
| FSC 4010 Chain and Wire Rope | FSC 4020 Fiber Rope Cordage and Twine | FSC 4030 Fittings for Rope Cable and Chain |
| FSC 4110 Refrigeration Equipment | FSC 4120 Air Conditioning Equipment | FSC 4130 Refrigeration and Air Condition Components | FSC 4150 Vortex Tubes and Other Related Cooling Tubes |
| FSC 4235 Hazardous Material Spill Containment and Clean up Equipment and Material | FSC 4250 Recycling and Reclamation Equipment |
| FSC 4310 Compressors AND Vacuum Pumps | FSC 4320 Power AND Hand Pumps | FSC 4330 Centrifugals Separators AND Pressure AND Vacuum Filters |
