The Damper,flue, cataloged under National Stock Number 4520-00-763-0772, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. The manufacturer of record is Us Army Aviation and Missile Command. Government technical data includes 5 specifications, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-00-763-0772 |
| Primary Part Number | 9181861 |
| Item Name | Damper,flue |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Mounting Method | INSERTED CENTER SHAFT |
| Overall Thickness | 0.625 INCHES NOMINAL IN |
| Shape | RECTANGULAR |
| Material | ALUMINUM ALLOY |
| Operation Method | AUTOMATIC |
| 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 |
|---|---|
| 9181861 | Raytheon Company (USA) |
| 9181861 | Raytheon Company Dba Raytheon Co (USA) |
| 9181861 PRIMARY | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| 9181861 | 5/9 Secondary reference Raytheon Company Div Corp |
| 9181861 | 5/9 Secondary reference Cla-Bar Industries |
NSN 4520-00-763-0772 is a Damper,flue, manufactured by Us Army Aviation and Missile Command, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-00-763-0772 has 3 manufacturer part numbers on file: 9181861 (Raytheon Company), 9181861 (Raytheon Company Dba Raytheon Co), 9181861 (Us Army Aviation and Missile Command).
Key specifications for 9181861: Mounting Method: INSERTED CENTER SHAFT; Overall Thickness: 0.625 INCHES NOMINAL IN; Shape: RECTANGULAR; Overall Length: 8.250 INCHES NOMINAL IN. 5 specifications are 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.
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.