# NSN 4520-01-657-4780: Heater, Duct Type, Stationary

NSN 4520-01-657-4780 (also written 4520016574780; NIIN 01-657-4780) is a heater, duct type, stationary 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: 4520-01-657-4780 (4520016574780)
- NIIN: 01-657-4780 (016574780)
- Item name: HEATER,DUCT TYPE,STATIONARY
- 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 |
| --- | --- | --- |
| ABAM | HEAT MEDIUM TYPE | AIR |
| ABAX | HEAT DELIVERY DIRECTION | HORIZONTAL |
| AGAV | END ITEM IDENTIFICATION | DUCT HEATER-NAVY VENTILIATION |
| BDXJ | HEATING ELEMENT TYPE | ELECTRIC NONIMMERSION |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | HEATER, AIR DUCT ELE |
| PRPY | PROPRIETARY CHARACTERISTICS | PACS |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 106-306339-000 | 07131 | CHROMALOX INC | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 106-306339-122 | 07131 | CHROMALOX INC | [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=4520016574780&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=4520016574780
- 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/4520-01-657-4780/
JSON: https://nsnexplorer.com/api/nsn/4520-01-657-4780.json