The Damper,flue, cataloged under National Stock Number 4520-00-781-3166, 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 Northrop Grumman Systems Corporation. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4520-00-781-3166 |
| Primary Part Number | A51E15029-14 |
| Item Name | Damper,flue |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| FSC Application Data | AIR CONDITIONING SYSTEM,AIRCRAFT |
| Mounting Method | INSERTED CENTER SHAFT |
| Shape | RECTANGULAR |
| Positioning Holder Type | QUADRANT |
| Material | COPPER ALLOY 511 |
| Operation Method | MANUAL |
| 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 |
|---|---|
| A51E15029-14 | Capy Machine Shop Inc. Dba Capy Machine Shop Inc (USA) |
| A51E15029-14 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51E15029-14 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
| A51E15029-14 | 3/9 Design control — primary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
NSN 4520-00-781-3166 is a Damper,flue, manufactured by Northrop Grumman Systems Corporation, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-00-781-3166 has 2 manufacturer part numbers on file: A51E15029-14 (Capy Machine Shop Inc. Dba Capy Machine Shop Inc), A51E15029-14 (Northrop Grumman Systems Corporation).
Key specifications for A51E15029-14: Overall Height: 1.090 INCHES NOMINAL IN; FSC Application Data: AIR CONDITIONING SYSTEM,AIRCRAFT; Mounting Method: INSERTED CENTER SHAFT; Shape: RECTANGULAR. 6 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.