The Flange,diffuser Case, cataloged under National Stock Number 2840-01-185-0790, 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 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2840-01-185-0790 |
| Primary Part Number | 4057652 |
| Item Name | Flange,diffuser Case |
| 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 |
| General Characteristics Item Description | MATL NICKEL ALLOY; 0.79 IN. LONG; FIRST END 9.77 IN. RADIUS; FLANGE 10.26 IN. RADIUS; SECOND END 9.7 IN. RADIUS; BORE 9.37 IN. RADIUS; FLANGE 0.28 IN. THICK; FIRST END 0.41 IN. LONG IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 4057652 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
NSN 2840-01-185-0790 is a Flange,diffuser Case, 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 2840-01-185-0790 has 1 manufacturer part number on file: 4057652 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 4057652: General Characteristics Item Description: MATL NICKEL ALLOY; 0.79 IN. LONG; FIRST END 9.77 IN. RADIUS; FLANGE 10.26 IN. RADIUS; SECOND END 9.7 IN. RADIUS; BORE 9.37 IN. RADIUS; FLANGE 0.28 IN. THICK; FIRST END 0.41 IN. LONG IN; End Item Identification: ACFT ENG F-100. 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.
NSN 2840-01-185-0790 has DEMIL Code B. 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.