The Duct Assembly,air-C, cataloged under National Stock Number 4120-01-520-6337, is classified within Federal Supply Class 4120 (Air Conditioning Equipment) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Arrowhead Products Corp. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4120-01-520-6337 |
| Primary Part Number | 500201-505 |
| Item Name | Duct Assembly,air-C |
| FSC / FSG | 4120 / 41 — Air Conditioning Equipment |
| Manufacturer | Arrowhead Products Corp |
| Status | ACTIVE |
| Criticality Code Justification | AGAV |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 74J830181-107 | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| 500201-505 PRIMARY | Arrowhead Products Corp (USA) |
| 74J830181-107 PRIMARY | The Boeing Company Div Defense (USA) |
NSN 4120-01-520-6337 is a Duct Assembly,air-C, manufactured by Arrowhead Products Corp, classified under FSC 4120, Air Conditioning Equipment. Status: active.
NSN 4120-01-520-6337 has 3 manufacturer part numbers on file: 74J830181-107 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), 500201-505 (Arrowhead Products Corp), 74J830181-107 (The Boeing Company Div Defense).
Key specifications for 500201-505: Criticality Code Justification: AGAV; Part Name Assigned by Controlling Agency: INAVY) DUCT ASSEMBLE, AIR; End Item Identification: AIRCRAFT, F18 E/F. 1 specification is documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
NSN 4120-01-520-6337 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.