The Damper,flue, cataloged under National Stock Number 4520-01-612-9403, is classified within Federal Supply Class 4520 (Space and Water Heating Equipment) of the Plumbing, Heating, and Waste Disposal group. Government technical data includes 5 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-612-9403 |
| Item Name | Damper,flue |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Status | ACTIVE |
| Mounting Method | AFFIXED END BEARING SHAFT |
| Overall Thickness | 0.125 INCHES NOMINAL IN |
| Shape | RECTANGULAR |
| Material | STEEL CORROSION RESISTING |
| 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 |
| Reference | Meaning |
|---|---|
| JE2016 ASSY # 4 | 5/2 Secondary reference U.S. Government activity |
| JE201612X08S604 | 3/2 Design control — primary reference U.S. Government activity |
| 03332039 | 5/2 Secondary reference U.S. Government activity |
NSN 4520-01-612-9403 is a Damper,flue, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
Key specifications for 4520-01-612-9403: Mounting Method: AFFIXED END BEARING SHAFT; Overall Thickness: 0.125 INCHES NOMINAL IN; Shape: RECTANGULAR; Overall Length: 15.25 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.