The Seal Assembly,shaft, cataloged under National Stock Number 2840-01-145-2557, 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 Magnetic Seal Llc. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2840-01-145-2557 |
| Primary Part Number | 77027 |
| Item Name | Seal Assembly,shaft |
| FSC / FSG | 2840 / 28 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components |
| Manufacturer | Magnetic Seal Llc |
| Status | ACTIVE |
| General Characteristics Item Description | HOUSING ASSEMBLY ALUMINUM; FLUID TO BE SEALED AIR AND OIL; PRESSURE RATING 0.0 TO 5.0 PSI; 0.917 IN. O/A OD; 0.373 IN. DIA OF SHAFT ACCOMODATED; 0.755 IN. O/A W IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 77027 PRIMARY | Magnetic Seal Llc (USA) |
| Reference | Meaning |
|---|---|
| 77027-1B | 5/9 Secondary reference Magnetic Seal Llc |
| 42312D171 | 5/2 Secondary reference U.S. Government activity |
| 42312-171 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 2840-01-145-2557 is a Seal Assembly,shaft, manufactured by Magnetic Seal Llc, classified under FSC 2840, Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components. Status: active.
NSN 2840-01-145-2557 has 1 manufacturer part number on file: 77027 (Magnetic Seal Llc).
1 possible match (shared part number, not a government interchangeability claim): 4730-01-697-3283. Verify interchangeability with system specifications before substitution.
Key specifications for 77027: General Characteristics Item Description: HOUSING ASSEMBLY ALUMINUM; FLUID TO BE SEALED AIR AND OIL; PRESSURE RATING 0.0 TO 5.0 PSI; 0.917 IN. O/A OD; 0.373 IN. DIA OF SHAFT ACCOMODATED; 0.755 IN. O/A W IN; End Item Identification: AIRCRAFT MODEL F-18. 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.
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.