The Cover Assembly, cataloged under National Stock Number 2825-01-171-7186, 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.. Government technical data includes 1 specification, cited from the U.S. Government catalog. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 3 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 2825-01-171-7186 |
| Primary Part Number | MS-549ER |
| Item Name | Cover Assembly |
| FSC / FSG | 2825 / 28 — Steam Turbines and Components |
| Manufacturer | Siemens Energy, Inc. |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL |
| 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 |
|---|---|
| H-5338 PIECE 39 | Siemens Energy, Inc. (USA) |
| MS-549ER PRIMARY | Siemens Energy, Inc. (USA) |
| Reference | Meaning |
|---|---|
| H-5338 | D/9 Drawing number reference only Siemens Energy, Inc. |
NSN 2825-01-171-7186 is a Cover Assembly, manufactured by Siemens Energy, Inc., classified under FSC 2825, Steam Turbines and Components. Status: active.
NSN 2825-01-171-7186 has 2 manufacturer part numbers on file: H-5338 PIECE 39 (Siemens Energy, Inc.), MS-549ER (Siemens Energy, Inc.).
3 possible matches (shared part number, not a government interchangeability claim): 2825-01-171-7187, 2825-01-171-7188, 2825-01-177-5180. Verify interchangeability with system specifications before substitution.
Key specifications for MS-549ER: General Characteristics Item Description: STEEL. 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.