PartsTable TECHNICAL DATA SHEET

NSN 2825-01-684-4442Government record, cited

Seal Ring Assembly, Labyrinth2825-01-684-4442

NSN 2825-01-684-4442 · NIIN 016844442 · Part number US30513-05

Defense Maritime Solutions, Inc. · FSC 2825 — Steam Turbines and Components · FSG 28 — Engines, Turbines, and Components · CAGE 0EYA6

Government record, cited

NSN 2825-01-684-4442 — this item is cataloged by the U.S. Government under National Stock Number 2825-01-684-4442. Manufacturer of record part number: US30513-05.

Also searched as 2825-01-684-4442 · 2825016844442 · NIIN 016844442 · 01-684-4442 · FSC 2825 Steam Turbines and Components · CAGE 0EYA6 · US30513-05 · US30513-05 REV D

Nearby stock numbers ← 2825-01-683-6014 Jacking Tool, Shaft · 2825-01-684-5263 Case, Steam Turbine Engine →

Features

Seal Ring Assembly,labyrinth — FSC 2825
2 manufacturer part numbers on file
Manufacturer of record: Defense Maritime Solutions, Inc.

Identification

NSN: 2825-01-684-4442
NIIN: 016844442
FSC: 2825 — Steam Turbines and Components
FSG: 28 — Engines, Turbines, and Components
Primary part number: US30513-05
Manufacturer: Defense Maritime Solutions, Inc.

General Description

The Seal Ring Assembly,labyrinth, cataloged under National Stock Number 2825-01-684-4442, is classified within Federal Supply Class 2825 (Steam Turbines and Components) of the Engines, Turbines, and Components group. The manufacturer of record is Defense Maritime Solutions, Inc.. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 12 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.

Catalog Facts

Item Name	Seal Ring Assembly,labyrinth
FSC / FSG	2825 — Steam Turbines and Components (FSG 28)
Manufacturers	Defense Maritime Solutions, Inc. (CAGE 0EYA6)

Technical Specifications

Parameter	Value
NSN	2825-01-684-4442
Primary Part Number	US30513-05
Item Name	Seal Ring Assembly,labyrinth
FSC / FSG	2825 / 28 — Steam Turbines and Components
Manufacturer	Defense Maritime Solutions, Inc.
Status	ACTIVE

Lifecycle & Compliance

Acquisition Status	ACTIVE
DEMIL Code	DEMIL Q — CCL Item — Commerce Control List
Hazard	No hazard code in the DLA record (HMIC N)
Criticality Code	X

⇄ Related Items 12

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

2090-01-695-1746H30513-05-2 POSSIBLE MATCH

FACE ASSEMBLY,SPLIT

Possible match (shared part number)Defense Maritime Solutions, Inc.

5330-01-714-6014H30513-05-8 POSSIBLE MATCH

RETAINER,PACKING

Possible match (shared part number)Defense Maritime Solutions, Inc.

5307-01-724-0850H30513-05-8-7 POSSIBLE MATCH

STUD,RECESSED

Possible match (shared part number)Defense Maritime Solutions, Inc.

5305-01-724-0954H30513-05-8-2 POSSIBLE MATCH

SCREW,CAP,SOCKET HEAD

Possible match (shared part number)Defense Maritime Solutions, Inc.

5330-01-724-1038H30513-05-8-5 POSSIBLE MATCH

RETAINER,PACKING

Possible match (shared part number)Defense Maritime Solutions, Inc.

5330-01-724-1057H30513-05-8-4 POSSIBLE MATCH

RUBBER ROUND SECTION

Possible match (shared part number)Defense Maritime Solutions, Inc.

5310-01-724-1078H30513-05-8-9 POSSIBLE MATCH

NUT,PLAIN,HEXAGON

Possible match (shared part number)Defense Maritime Solutions, Inc.

5315-01-724-1715H30513-05-8-3 POSSIBLE MATCH

PIN,STRAIGHT,HEADLESS

Possible match (shared part number)Defense Maritime Solutions, Inc.

5330-01-724-6224H30513-05-8-1 POSSIBLE MATCH

PACKING MATERIAL

Possible match (shared part number)Defense Maritime Solutions, Inc.

5310-01-724-6248H30513-05-8-8 POSSIBLE MATCH

WASHER,FLAT

Possible match (shared part number)Defense Maritime Solutions, Inc.

Cross-Reference Index

Part Number	Manufacturer
US30513-05 REV D	Defense Maritime Solutions, Inc. (USA)
US30513-05 PRIMARY	Defense Maritime Solutions, Inc. (USA)

Related Parts

2090-01-695-1746POSSIBLE MATCH

FACE ASSEMBLY,SPLIT

H30513-05-2

5330-01-714-6014POSSIBLE MATCH

RETAINER,PACKING

H30513-05-8

5307-01-724-0850POSSIBLE MATCH

STUD,RECESSED

H30513-05-8-7

5305-01-724-0954POSSIBLE MATCH

SCREW,CAP,SOCKET HEAD

H30513-05-8-2

5330-01-724-1038POSSIBLE MATCH

RETAINER,PACKING

H30513-05-8-5

5330-01-724-1057POSSIBLE MATCH

RUBBER ROUND SECTION

H30513-05-8-4

5310-01-724-1078POSSIBLE MATCH

NUT,PLAIN,HEXAGON

H30513-05-8-9

5315-01-724-1715POSSIBLE MATCH

PIN,STRAIGHT,HEADLESS

H30513-05-8-3

5330-01-724-6224POSSIBLE MATCH

PACKING MATERIAL

H30513-05-8-1

5310-01-724-6248POSSIBLE MATCH

WASHER,FLAT

H30513-05-8-8

5325-01-724-6338POSSIBLE MATCH

RING,RETAINING

H30513-05-8-13

5305-01-724-6363POSSIBLE MATCH

SCREW,MACHINE

H30513-05-8-6

Frequently Asked Questions

What is NSN 2825-01-684-4442?

NSN 2825-01-684-4442 is a Seal Ring Assembly,labyrinth, manufactured by Defense Maritime Solutions, Inc., classified under FSC 2825, Steam Turbines and Components. Status: active.

What part numbers are listed for NSN 2825-01-684-4442?

NSN 2825-01-684-4442 has 2 manufacturer part numbers on file: US30513-05 REV D (Defense Maritime Solutions, Inc.), US30513-05 (Defense Maritime Solutions, Inc.).

What NSN replaces 2825-01-684-4442?

12 possible matches (shared part number, not a government interchangeability claim): 2090-01-695-1746, 5330-01-714-6014, 5307-01-724-0850. Verify interchangeability with system specifications before substitution.

Is NSN 2825-01-684-4442 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.

What is the DEMIL code for NSN 2825-01-684-4442?

NSN 2825-01-684-4442 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.

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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