The Seal,air,aircraft Gas Turbine En, cataloged under National Stock Number 2840-00-784-4686, 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 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2840-00-784-4686 |
| Primary Part Number | 400854 |
| 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 |
| Design Type | COMPRESSOR |
| Criticality Code Justification | AGAV |
| Engine Section Location | COMPRESSOR |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 400854 | Rtx Corporation Div Pratt & Whitney (USA) |
| 400854 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| 400854 | Ambel Precision Manufacturing Corporation (USA) |
| Reference | Meaning |
|---|---|
| 400854 | 5/9 Secondary reference Turbo Power & Marine System Inc Sub of United Technologies Corp |
| 400854 | 5/9 Secondary reference Union Machine Co of Lynn, Inc |
| 400854 | 5/9 Secondary reference U.S. Government activity |
NSN 2840-00-784-4686 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 2840-00-784-4686 has 3 manufacturer part numbers on file: 400854 (Rtx Corporation Div Pratt & Whitney), 400854 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney), 400854 (Ambel Precision Manufacturing Corporation).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-336-9606. Verify interchangeability with system specifications before substitution.
Key specifications for 400854: Stage Number: 3; Design Type: COMPRESSOR; Criticality Code Justification: AGAV; Engine Section Location: COMPRESSOR. 4 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.