The Cover Assembly,turb, cataloged under National Stock Number 2825-01-169-7556, is classified within Federal Supply Class 2825 (Steam Turbines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Siemens Energy, Inc.. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Item Name | Cover Assembly,turb |
| FSC / FSG | 2825 — Steam Turbines and Components (FSG 28) |
| Manufacturers | Siemens Energy, Inc. (CAGE 16712) |
| Parameter | Value |
|---|---|
| NSN | 2825-01-169-7556 |
| Primary Part Number | MS549BZ |
| Item Name | Cover Assembly,turb |
| FSC / FSG | 2825 / 28 — Steam Turbines and Components |
| Manufacturer | Siemens Energy, Inc. |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Part Number | Manufacturer |
|---|---|
| H3503PIECE4 | Siemens Energy, Inc. (USA) |
| MS549BZ PRIMARY | Siemens Energy, Inc. (USA) |
| Reference | Meaning |
|---|---|
| H3503 | D/9 Drawing number reference only Siemens Energy, Inc. |
NSN 2825-01-169-7556 is a Cover Assembly,turb, manufactured by Siemens Energy, Inc., classified under FSC 2825, Steam Turbines and Components. Status: active.
NSN 2825-01-169-7556 has 2 manufacturer part numbers on file: H3503PIECE4 (Siemens Energy, Inc.), MS549BZ (Siemens Energy, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 2825-01-169-7681. Verify interchangeability with system specifications before substitution.
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.