The Seal,metallic,aircraft Gas Turbi, cataloged under National Stock Number 2840-01-346-0657, 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 5 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2840-01-346-0657 |
| Primary Part Number | 671123 |
| Item Name | Seal,metallic,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 |
| Stage Number | 2 |
| Criticality Code Justification | AGAV |
| Diameter | 11.030 INCHES MINIMUM AND 11.050 INCHES MAXIMUM IN |
| Engine Section Location | TURBINE |
| Material | STEEL CORROSION RESISTING 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 | Y |
| Part Number | Manufacturer |
|---|---|
| 671123 | Rtx Corporation Div Pratt & Whitney (USA) |
| 671123 | Union Machine Co of Lynn, Inc (USA) |
| 671123 PRIMARY | Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney (USA) |
| Reference | Meaning |
|---|---|
| 671123 | 5/9 Secondary reference Electro-Methods, L.p. |
| 671123 | 5/9 Secondary reference Pcx Aerosystems-Manchester, Llc Dba Pcx Aerosystems - Manchester Llc |
| 671123 | 5/9 Secondary reference Pego Corp |
| 671123 | 5/9 Secondary reference U.S. Government activity |
NSN 2840-01-346-0657 is a Seal,metallic,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 2840-01-346-0657 has 3 manufacturer part numbers on file: 671123 (Rtx Corporation Div Pratt & Whitney), 671123 (Union Machine Co of Lynn, Inc), 671123 (Rtx Corporation Dba Pratt & Whitney Div Pratt &whitney).
Key specifications for 671123: Stage Number: 2; Criticality Code Justification: AGAV; Diameter: 11.030 INCHES MINIMUM AND 11.050 INCHES MAXIMUM IN; Overall Length: 1.530 INCHES MINIMUM AND 1.550 INCHES MAXIMUM IN. 5 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 2840-01-346-0657 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.