The Seal,air,aircraft Gas Turbine En, cataloged under National Stock Number 2840-01-320-5344, 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 8 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2840-01-320-5344 |
| Primary Part Number | 4075741-01 |
| Item Name | Seal,air,aircraft Gas Turbine En |
| 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 |
| Stage Number | 3 |
| Hardness Rating | 34.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM OVERALL |
| Criticality Code Justification | AGAV |
| Material Document and Classification | AMS5536 ASSN STD 1ST MATERIAL RESPONSE AND AMS5544 ASSN STD 2ND MATERIAL RESPONSE OVERALL |
| Diameter | 18.335 INCHES MINIMUM AND 18.345 INCHES MAXIMUM IN |
| Engine Section Location | TURBINE |
| Material Thickness | 0.040 INCHES MINIMUM AND 0.050 INCHES MAXIMUM IN |
| Material | NICKEL ALLOY OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 4075741-01 | Rtx Corporation Div Pratt & Whitney (USA) |
| 4075741-01 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 4075741-01 | 5/9 Secondary reference Unison Engine Components Inc. |
| 4075741-01 | 5/1 Secondary reference Hanwha Aerospace Co., Ltd Div Ps Business Unit |
| 2840PL0788952 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 2840-01-320-5344 is a Seal,air,aircraft Gas Turbine En, 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 2840-01-320-5344 has 2 manufacturer part numbers on file: 4075741-01 (Rtx Corporation Div Pratt & Whitney), 4075741-01 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 4075741-01: Stage Number: 3; Hardness Rating: 34.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM OVERALL; Criticality Code Justification: AGAV; Material Document and Classification: AMS5536 ASSN STD 1ST MATERIAL RESPONSE AND AMS5544 ASSN STD 2ND MATERIAL RESPONSE OVERALL. 8 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 2840-01-320-5344 has DEMIL Code Q. 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.