The Cartridge,turbocharger, cataloged under National Stock Number 2990-01-295-9753, 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 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 2990-01-295-9753 |
| Primary Part Number | 1N3999 |
| Item Name | Cartridge,turbocharger |
| FSC / FSG | 2990 / 29 — Miscellaneous Engine Accessories, Nonaircraft |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| General Characteristics Item Description | CENTER HOUSING AND ROTATING ASSY, MINUS END HOUSINGS |
| 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 |
|---|---|
| 1N3999 | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| 408742-18 | 5/9 Secondary reference Garrett Transportation I, Inc. |
| 408742-5018 | 3/9 Design control — primary reference Garrett Transportation I, Inc. |
NSN 2990-01-295-9753 is a Cartridge,turbocharger, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2990, Miscellaneous Engine Accessories, Nonaircraft. Status: active.
NSN 2990-01-295-9753 has 1 manufacturer part number on file: 1N3999 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for 1N3999: General Characteristics Item Description: CENTER HOUSING AND ROTATING ASSY, MINUS END HOUSINGS; End Item Identification: 3930-01-269-4938. 1 specification is 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.