The Duct Assembly,air-C, cataloged under National Stock Number 4120-01-570-9629, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4120-01-570-9629 |
| Primary Part Number | 500201-109 |
| 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 Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 74J830181-109 | The Boeing Company Div Defense (USA) |
| 74J830181-109 | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| 500201-109 PRIMARY | Arrowhead Products Corp (USA) |
| Reference | Meaning |
|---|---|
| 74J830181 | D/9 Drawing number reference only Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
NSN 4120-01-570-9629 is a Duct Assembly,air-C, manufactured by Arrowhead Products Corp, classified under FSC 4120, Air Conditioning Equipment. Status: active.
NSN 4120-01-570-9629 has 3 manufacturer part numbers on file: 74J830181-109 (The Boeing Company Div Defense), 74J830181-109 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), 500201-109 (Arrowhead Products Corp).
Key specifications for 500201-109: Criticality Code Justification: AGAV; End Item Identification: FIGHTER AIRCRAFT-FIRST (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 4120-01-570-9629 has DEMIL Code Q. 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.