The Damper,air Duct, cataloged under National Stock Number 4130-01-666-4577, is classified within Federal Supply Class 4130 (Refrigeration and Air Conditioning Components) of the Refrigeration, AC, and Air Circulating Equipment group. The manufacturer of record is Lockheed Martin Corporation Div Rms. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Damper,air Duct |
| FSC / FSG | 4130 — Refrigeration and Air Conditioning Components (FSG 41) |
| Manufacturers | Lockheed Martin Corporation Div Rms (CAGE 02769) |
| Parameter | Value |
|---|---|
| NSN | 4130-01-666-4577 |
| Primary Part Number | 20539437-1 |
| Item Name | Damper,air Duct |
| FSC / FSG | 4130 / 41 — Refrigeration and Air Conditioning Components |
| Manufacturer | Lockheed Martin Corporation Div Rms |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 20539437-1 PRIMARY | Lockheed Martin Corporation Div Rms (USA) |
| Reference | Meaning |
|---|---|
| 20539437 | D/9 Drawing number reference only Lockheed Martin Corporation Div Rms |
NSN 4130-01-666-4577 is a Damper,air Duct, manufactured by Lockheed Martin Corporation Div Rms, classified under FSC 4130, Refrigeration and Air Conditioning Components. Status: active.
NSN 4130-01-666-4577 has 1 manufacturer part number on file: 20539437-1 (Lockheed Martin Corporation Div Rms).
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.