The Damper,flue, cataloged under National Stock Number 4520-01-538-9448, 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 Naval Sea Systems Command. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4520-01-538-9448 |
| Primary Part Number | 845-4675598 ASSY A |
| Item Name | Damper,flue |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| 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 |
|---|---|
| 845-4675598 ASSY A PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 2642-643-07 ASSY A | 5/9 Secondary reference U.S. Government activity |
| 78-34-0586A | 5/2 Secondary reference U.S. Government activity |
NSN 4520-01-538-9448 is a Damper,flue, manufactured by Naval Sea Systems Command, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-538-9448 has 1 manufacturer part number on file: 845-4675598 ASSY A (Naval Sea Systems Command).
Key specifications for 845-4675598 ASSY A: Special Features: THIS ITEM IS AN ASSEMBLY AND INCLUDES THE CONTROL HANDLE AND ALL ASSOCIATED MOUNTING PARTS; Part Name Assigned by Controlling Agency: INAVY DAMPER,VENT; End Item Identification: OHIO CLASS SSBN (TRIDENT); Operation Method: MANUAL. 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.
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.