The Heater,coolant,engine, cataloged under National Stock Number 2990-01-445-2301, is classified within Federal Supply Class 2990 (Miscellaneous Engine Accessories, Nonaircraft) of the Engine Accessories group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 2990-01-445-2301 |
| Primary Part Number | 1Q-4311 |
| Item Name | Heater,coolant,engine |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Fuel Type | DIESEL |
| Power Source for Which Designed | FUEL |
| Heat Delivery Rate in Btu Per Hour | 24000.0 |
| 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 |
|---|---|
| CA 1667 61 | Illini Power Products Co (USA) |
| 1Q-4311 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| CA 1667 61 | 5/9 Secondary reference Espar Products Inc |
NSN 2990-01-445-2301 is a Heater,coolant,engine, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-445-2301 has 2 manufacturer part numbers on file: CA 1667 61 (Illini Power Products Co), 1Q-4311 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 1Q-4311: Fuel Type: DIESEL; Power Source for Which Designed: FUEL; End Item Identification: 2430-01-423-2819; Heat Delivery Rate in Btu Per Hour: 24000.0. 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.