PartsTable TECHNICAL DATA SHEET

NSN 2825-01-168-2039Government record, cited

Guard, Reduction Gear2825-01-168-2039

NSN 2825-01-168-2039 · NIIN 011682039 · Part number KD449Z

Siemens Energy, Inc. · FSC 2825 — Steam Turbines and Components · FSG 28 — Engines, Turbines, and Components · CAGE 16712

Government record, cited

NSN 2825-01-168-2039 — this item is cataloged by the U.S. Government under National Stock Number 2825-01-168-2039. Manufacturer of record part number: KD449Z.

Also searched as 2825-01-168-2039 · 2825011682039 · NIIN 011682039 · 01-168-2039 · FSC 2825 Steam Turbines and Components · CAGE 16712 · KD449Z · F7805 · KD449ZUL · F7805 PIECE 52

Nearby stock numbers ← 2825-01-168-2038 Cover, Reduction Gear · 2825-01-168-2632 Rod, Connecting →

Features

Guard,reduction Gear — FSC 2825
General Characteristics Item Description: STEEL
2 manufacturer part numbers on file
Manufacturer of record: Siemens Energy, Inc.

Identification

NSN: 2825-01-168-2039
NIIN: 011682039
FSC: 2825 — Steam Turbines and Components
FSG: 28 — Engines, Turbines, and Components
Primary part number: KD449Z
Manufacturer: Siemens Energy, Inc.

General Description

The Guard,reduction Gear, cataloged under National Stock Number 2825-01-168-2039, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 10 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Technical Specifications

Parameter	Value
NSN	2825-01-168-2039
Primary Part Number	KD449Z
Item Name	Guard,reduction Gear
FSC / FSG	2825 / 28 — Steam Turbines and Components
Manufacturer	Siemens Energy, Inc.
Status	ACTIVE
General Characteristics Item Description	STEEL

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL A — No Demilitarization Required
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

⇄ Related Items 10

Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.

2910-01-168-9491KD345BH POSSIBLE MATCH

NOZZLE,REDUCTION GE

Possible match (shared part number)Siemens Energy, Inc.

2825-01-168-9492KD305LX2 POSSIBLE MATCH

CAP,REDUCTION GEAR

Possible match (shared part number)Siemens Energy, Inc.

2910-01-168-9493KD345BG POSSIBLE MATCH

NOZZLE,REDUCTION GE

Possible match (shared part number)Siemens Energy, Inc.

2910-01-168-9494KD345BK POSSIBLE MATCH

NOZZLE,REDUCTION GE

Possible match (shared part number)Siemens Energy, Inc.

3010-01-169-7415F7805 PIECE 31,35 POSSIBLE MATCH

COUPLING,SHAFT,RIGID

Possible match (shared part number)Siemens Energy, Inc.

2910-01-170-0741KD-345BF POSSIBLE MATCH

NOZZLE,GEAR ASSEMBL

Possible match (shared part number)Siemens Energy, Inc.

2825-01-170-0813KD-305LX1 POSSIBLE MATCH

CAP,REDUCTION GEAR,STEAM TURBINE

Possible match (shared part number)Siemens Energy, Inc.

2825-01-170-6881KD301CA POSSIBLE MATCH

COVER,REDUCTION GEA

Possible match (shared part number)Siemens Energy, Inc.

2825-01-170-6882KD-449ZX1 POSSIBLE MATCH

GUARD,REDUCTION GEA

Possible match (shared part number)Siemens Energy, Inc.

2825-01-170-6883RGR-317-A1 POSSIBLE MATCH

HOUSING,REDUCTION G

Possible match (shared part number)Timken Gears & Services Inc. Dba Philadelphia Gear Div Western Regional Service Center

Cross-Reference Index

Part Number	Manufacturer
KD449Z PRIMARY	Siemens Energy, Inc. (USA)
F7805 PIECE 52	Siemens Energy, Inc. (USA)

Reference documents

Reference	Meaning
F7805	D/9 Drawing number reference only Siemens Energy, Inc.
KD449ZUL	5/9 Secondary reference Siemens Energy, Inc.

Related Parts

2910-01-168-9491POSSIBLE MATCH

NOZZLE,REDUCTION GE

KD345BH

2825-01-168-9492POSSIBLE MATCH

CAP,REDUCTION GEAR

KD305LX2

2910-01-168-9493POSSIBLE MATCH

NOZZLE,REDUCTION GE

KD345BG

2910-01-168-9494POSSIBLE MATCH

NOZZLE,REDUCTION GE

KD345BK

3010-01-169-7415POSSIBLE MATCH

COUPLING,SHAFT,RIGID

F7805 PIECE 31,35

2910-01-170-0741POSSIBLE MATCH

NOZZLE,GEAR ASSEMBL

KD-345BF

2825-01-170-0813POSSIBLE MATCH

CAP,REDUCTION GEAR,STEAM TURBINE

KD-305LX1

2825-01-170-6881POSSIBLE MATCH

COVER,REDUCTION GEA

KD301CA

2825-01-170-6882POSSIBLE MATCH

GUARD,REDUCTION GEA

KD-449ZX1

2825-01-170-6883POSSIBLE MATCH

HOUSING,REDUCTION G

RGR-317-A1

Frequently Asked Questions

What is NSN 2825-01-168-2039?

NSN 2825-01-168-2039 is a Guard,reduction Gear, manufactured by Siemens Energy, Inc., classified under FSC 2825, Steam Turbines and Components. Status: active.

What part numbers are listed for NSN 2825-01-168-2039?

NSN 2825-01-168-2039 has 2 manufacturer part numbers on file: KD449Z (Siemens Energy, Inc.), F7805 PIECE 52 (Siemens Energy, Inc.).

What NSN replaces 2825-01-168-2039?

10 possible matches (shared part number, not a government interchangeability claim): 2910-01-168-9491, 2825-01-168-9492, 2910-01-168-9493. Verify interchangeability with system specifications before substitution.

What are the specifications of KD449Z?

Key specifications for KD449Z: General Characteristics Item Description: STEEL. 1 specification is documented in the U.S. Government catalog.

Is NSN 2825-01-168-2039 hazardous material?

No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.

Sources

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.

✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.

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