The Heater,coolant,engine, cataloged under National Stock Number 2990-01-677-7704, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is General Motors Corp. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2990-01-677-7704 |
| Primary Part Number | 12705875 |
| Item Name | Heater,coolant,engine |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | General Motors Corp |
| Status | ACTIVE |
| Voltage in Volts and Current Type | 120.0 AC |
| Fuel Type | DIESEL |
| Power Source for Which Designed | ELECTRICITY |
| 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 |
|---|---|
| 12705875 PRIMARY | General Motors Corp (USA) |
| Reference | Meaning |
|---|---|
| 12679297 | 5/9 Secondary reference General Motors Corp |
| 4392937 | 7/2 Vendor item drawing reference Oshkosh Defense Llc |
NSN 2990-01-677-7704 is a Heater,coolant,engine, manufactured by General Motors Corp, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-677-7704 has 1 manufacturer part number on file: 12705875 (General Motors Corp).
Key specifications for 12705875: Voltage in Volts and Current Type: 120.0 AC; Fuel Type: DIESEL; Power Source for Which Designed: ELECTRICITY; 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 LBS. 3 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.