The Damper,flue, cataloged under National Stock Number 4520-01-674-3147, 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 Greenheck Fan Corporation Dba Greenheck Fan Corp. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Item Name | Damper,flue |
| FSC / FSG | 4520 — Space and Water Heating Equipment (FSG 45) |
| Manufacturers | Greenheck Fan Corporation Dba Greenheck Fan Corp (CAGE 51704) |
| Parameter | Value |
|---|---|
| NSN | 4520-01-674-3147 |
| Primary Part Number | S2100-0010 |
| Item Name | Damper,flue |
| FSC / FSG | 4520 / 45 — Space and Water Heating Equipment |
| Manufacturer | Greenheck Fan Corporation Dba Greenheck Fan Corp |
| Status | ACTIVE |
| 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 |
|---|---|
| S2100-0010 PRIMARY | Greenheck Fan Corporation Dba Greenheck Fan Corp (USA) |
| HSV-230-9X9IN | Greenheck Fan Corporation Dba Greenheck Fan Corp (USA) |
| Reference | Meaning |
|---|---|
| S2100-0010 REV 2 | D/9 Drawing number reference only Greenheck Fan Corporation Dba Greenheck Fan Corp |
NSN 4520-01-674-3147 is a Damper,flue, manufactured by Greenheck Fan Corporation Dba Greenheck Fan Corp, classified under FSC 4520, Space and Water Heating Equipment. Status: active.
NSN 4520-01-674-3147 has 2 manufacturer part numbers on file: S2100-0010 (Greenheck Fan Corporation Dba Greenheck Fan Corp), HSV-230-9X9IN (Greenheck Fan Corporation Dba Greenheck Fan Corp).
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.