The Damper,flue, cataloged under National Stock Number 4520-01-499-8385, 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 Department of the Army Hq United States Army Communications Research and Development Command. Government technical data includes 7 specifications, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4520-01-499-8385 |
| Primary Part Number | B4031487-002 |
| Item Name | Damper,flue |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Department of the Army Hq United States Army Communications Research and Development Command |
| Status | ACTIVE |
| Mounting Method | HINGE |
| Shape | RECTANGULAR |
| Length | 15.500 INCHES IN |
| Width | 11.120 INCHES IN |
| Surface Treatment | PAINT |
| Material | ALUMINUM |
| 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 |
|---|---|
| B4031487-002 PRIMARY | Department of the Army Hq United States Army Communications Research and Development Command (USA) |
| Reference | Meaning |
|---|---|
| S-SHL-1E1I-F-002 | 5/9 Secondary reference Sparrow C E Co |
NSN 4520-01-499-8385 is a Damper,flue, manufactured by Department of the Army Hq United States Army Communications Research and Development Command, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-499-8385 has 1 manufacturer part number on file: B4031487-002 (Department of the Army Hq United States Army Communications Research and Development Command).
Key specifications for B4031487-002: Overall Height: 15.000 INCHES NOMINAL IN; Mounting Method: HINGE; Shape: RECTANGULAR; Overall Length: 18.500 INCHES NOMINAL IN. 7 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.