# NSN 2990-01-677-7704: Heater, Coolant, Engine

NSN 2990-01-677-7704 (also written 2990016777704; NIIN 01-677-7704) is a heater, coolant, engine in Federal Supply Class 2990, Miscellaneous Engine Accessories, Nonaircraft. 3 manufacturer part numbers from 2 suppliers are on record. No purchases are on record yet.

## Identification

- NSN: 2990-01-677-7704 (2990016777704)
- NIIN: 01-677-7704 (016777704)
- Item name: HEATER,COOLANT,ENGINE
- Federal Supply Class: [FSC 2990 Miscellaneous Engine Accessories, Nonaircraft](https://nsnexplorer.com/fsc/2990/)
- Federal Supply Group: [FSG 29](https://nsnexplorer.com/group/29/)
- Acquisition method suffix code: AMSC D: the data needed to compete the part is unavailable or cannot be obtained economically. (observed 2026-10-23)
- Acquisition method code: 3

## Characteristics

| Code | Requirement | Reply |
| --- | --- | --- |
| AGAV | END ITEM IDENTIFICATION | 016536516 |
| ARHZ | POWER SOURCE FOR WHICH DESIGNED | ELECTRICITY |
| CSBH | VOLTAGE IN VOLTS AND CURRENT TYPE | AC 120.0 |
| CXCY | PART NAME ASSIGNED BY CONTROLLING AGENCY | HEATER,ENGINE COOLANT,DMAX |
| FEAT | SPECIAL FEATURES | LENGTH 76.1;DIAMETER 42.5;THREADS M33-1.50;WEIGHT 0.61LBS;120/VAC;HOUSING MATERIAL IS BRASS;ELECTRODE MATERIAL IS COPPER |
| FUEL | FUEL TYPE | DIESEL |

## Part numbers

| Part number | CAGE | Supplier | Source |
| --- | --- | --- | --- |
| 12679297 | 24617 | GENERAL MOTORS CORP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 12705875 | 24617 | GENERAL MOTORS CORP | [flis](https://www.dla.mil/Portals/104/Documents/InformationOperations/LogisticsInformationServices/FOIA/PUBLOG/) |
| 4392937 | 75Q65 | OSHKOSH DEFENSE LLC | [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=2990016777704&category=nsn
- DLA DIBBS awards for this NSN: https://www.dibbs.bsm.dla.mil/Awards/AwdRecs.aspx?category=awdnsn&TypeSrch=cq&Value=2990016777704
- 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/2990-01-677-7704/
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