# NSN 4520-01-674-3772: Damper, Flue

NSN 4520-01-674-3772 (also written 4520016743772; NIIN 01-674-3772) is a damper, flue in Federal Supply Class 4520, Space and Water Heating Equipment. 2 manufacturer part numbers from 1 supplier are on record. No purchases are on record yet.

## Identification

- NSN: 4520-01-674-3772 (4520016743772)
- NIIN: 01-674-3772 (016743772)
- Item name: DAMPER,FLUE
- Federal Supply Class: [FSC 4520 Space and Water Heating Equipment](https://nsnexplorer.com/fsc/4520/)
- Federal Supply Group: [FSG 45](https://nsnexplorer.com/group/45/)
- Acquisition method suffix code: AMSC Q: the government lacks adequate data or rights, but breakout to competition is expected. (observed 2026-10-10)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AMWN | MODEL NUMBER | HSV-230 |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | DAMPER, SHOCK, 38IN X 18IN; |
| FEAT | SPECIAL FEATURES | FLANGE FASTENERS SHALL BE GRADE 5; |
| MATT | MATERIAL | STEEL |
| PRPY | PROPRIETARY CHARACTERISTICS | PACS |
| SHPE | SHAPE | RECTANGULAR |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| S2100-0016 | 51704 | GREENHECK FAN CORPORATION DBA GREENHECK FAN CORP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| S2100-0016 REV 3 | 51704 | GREENHECK FAN CORPORATION DBA GREENHECK FAN CORP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |

## Sources

- DLA DIBBS RFQs for this NSN: https://www.dibbs.bsm.dla.mil/RFQ/RFQNsn.aspx?value=4520016743772&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4520016743772
- AMSC record: https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/
- All data is public U.S. government data; every row above links to its source record where one exists.

Canonical page: https://nsnexplorer.com/nsn/4520-01-674-3772/
JSON: https://nsnexplorer.com/api/nsn/4520-01-674-3772.json