The Engine,diesel, cataloged under National Stock Number 2815-01-258-4308, is classified within Federal Supply Class 2815 (Diesel Engines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 9 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2815-01-258-4308 |
| Primary Part Number | D398TA-ARR 5N7277 |
| Item Name | Engine,diesel |
| FSC / FSG | 2815 / 28 — Diesel Engines and Components |
| Manufacturer | Caterpillar Inc Div Caterpillar Defense |
| Status | ACTIVE |
| Strokes Per Cycle | 4 |
| Main Power Takeoff Rotation Direction | COUNTERCLOCKWISE |
| Crankshaft Rotation Direction | COUNTERCLOCKWISE |
| Piston Action Type | SINGLE ACTING |
| Starting Method | AIR |
| Cylinder Quantity | 12 |
| Cylinder Arrangement | SINGLE V-TYPE |
| Standard Bore Diameter | 6.250 INCHES IN |
| Stroke Length | 8.000 INCHES IN |
| 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 |
|---|---|
| D398TA-ARR 5N7277 PRIMARY | Caterpillar Inc Div Caterpillar Defense (USA) |
| Reference | Meaning |
|---|---|
| D398BPCTA-ARR 5N7277 | 5/1 Secondary reference Caterpillar Inc Div Caterpillar Defense |
NSN 2815-01-258-4308 is a Engine,diesel, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 2815, Diesel Engines and Components. Status: active.
NSN 2815-01-258-4308 has 1 manufacturer part number on file: D398TA-ARR 5N7277 (Caterpillar Inc Div Caterpillar Defense).
Key specifications for D398TA-ARR 5N7277: Strokes Per Cycle: 4; Main Power Takeoff Rotation Direction: COUNTERCLOCKWISE; Crankshaft Rotation Direction: COUNTERCLOCKWISE; Piston Action Type: SINGLE ACTING. 9 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.