The Seal Assembly,rear, cataloged under National Stock Number 2840-01-121-4453, 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 Allison Transmission Inc Dba Allison Transmission, Inc. 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. 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 | 2840-01-121-4453 |
| Primary Part Number | 6897459 |
| Item Name | Seal Assembly,rear |
| FSC / FSG | 2840 / 28 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components |
| Manufacturer | Allison Transmission Inc Dba Allison Transmission, Inc |
| Status | ACTIVE |
| General Characteristics Item Description | CRES |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 6897459 PRIMARY | Allison Transmission Inc Dba Allison Transmission, Inc (USA) |
NSN 2840-01-121-4453 is a Seal Assembly,rear, manufactured by Allison Transmission Inc Dba Allison Transmission, Inc, classified under FSC 2840, Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components. Status: active.
NSN 2840-01-121-4453 has 1 manufacturer part number on file: 6897459 (Allison Transmission Inc Dba Allison Transmission, Inc).
1 possible match (shared part number, not a government interchangeability claim): 2840-01-410-6751. Verify interchangeability with system specifications before substitution.
Key specifications for 6897459: General Characteristics Item Description: CRES; End Item Identification: ENGINE T56. 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 2840-01-121-4453 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.