The Case,diffuser,aircraft Gas Turbi, cataloged under National Stock Number 2840-01-448-0656, is classified within Federal Supply Class 2840 (Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2840-01-448-0656 |
| Primary Part Number | 4083564 |
| Item Name | Case,diffuser,aircraft Gas Turbi |
| FSC / FSG | 2840 / 28 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components |
| Manufacturer | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney |
| Status | ACTIVE |
| Design Type | AXIAL COMPRESSOR |
| Hardness Rating | 34.0 ROCKWELL C NOMINAL OVERALL |
| Criticality Code Justification | ABHP AND ABMZ AND CQFM |
| Diameter | 28.330 INCHES MINIMUM AND 28.350 INCHES MAXIMUM IN |
| Engine Section Location | TURBINE |
| Material | STEEL OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
NSN 2840-01-448-0656 is a Case,diffuser,aircraft Gas Turbi, manufactured by Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney, classified under FSC 2840, Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components. Status: active.
NSN 2840-01-448-0656 has 3 manufacturer part numbers on file: 4083564 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 4084237 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 4083558 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 4083564: Design Type: AXIAL COMPRESSOR; Hardness Rating: 34.0 ROCKWELL C NOMINAL OVERALL; Criticality Code Justification: ABHP AND ABMZ AND CQFM; Diameter: 28.330 INCHES MINIMUM AND 28.350 INCHES MAXIMUM IN. 6 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.
NSN 2840-01-448-0656 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
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.