The Seal Assembly,rotating, cataloged under National Stock Number 2840-01-081-7905, is classified within Federal Supply Class 2840 (Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components) of the Engines, Turbines, and Components group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 2840-01-081-7905 |
| Item Name | Seal Assembly,rotating |
| FSC / FSG | 2840 / 28 — Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL AISI NO 685,3.540 IN. MIN,3.545 IN. MAX. CIRCULAR DIA.,2.789 IN. MIN,2.790 IN. MAX. ID IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Reference | Meaning |
|---|---|
| 3101580-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 2840-01-081-7905 is a Seal Assembly,rotating, classified under FSC 2840, Gas Turbines and Jet Engines, Aircraft, Prime Moving; and Components. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 2540-01-085-0758. Verify interchangeability with system specifications before substitution.
Key specifications for 2840-01-081-7905: General Characteristics Item Description: STEEL AISI NO 685,3.540 IN. MIN,3.545 IN. MAX. CIRCULAR DIA.,2.789 IN. MIN,2.790 IN. MAX. ID IN. 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 2840-01-081-7905 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.