PartsTable TECHNICAL DATA SHEET

NSN 3120-01-508-8501Government record, cited

Bearing Assembly, Stern Tube3120-01-508-8501

NSN 3120-01-508-8501 · NIIN 015088501 · Part number H73918-02-3-2

Defense Maritime Solutions, Inc. · FSC 3120 — Bearings, Plain, Unmounted · FSG 31 — Bearings · CAGE 0EYA6

Government record, cited

NSN 3120-01-508-8501 — this item is cataloged by the U.S. Government under National Stock Number 3120-01-508-8501. Manufacturer of record part number: H73918-02-3-2.

Also searched as 3120-01-508-8501 · 3120015088501 · NIIN 015088501 · 01-508-8501 · FSC 3120 Bearings, Plain, Unmounted · CAGE 0EYA6 · H73918-02-3-2 · US73918-02 H73918-02-3-2 · US73918-02 · US73918-02 H73918-02-3-2

Nearby stock numbers ← 3120-01-508-8131 Bearing Half, Sleeve · 3120-01-508-8524 Bushing, Sleeve →

3120-01-508-8501 — Bearings, Plain, Unmounted

Features

Bearing Assembly,stern Tube — FSC 3120
1 manufacturer part number on file
Manufacturer of record: Defense Maritime Solutions, Inc.

Identification

NSN: 3120-01-508-8501
NIIN: 015088501
FSC: 3120 — Bearings, Plain, Unmounted
FSG: 31 — Bearings
Primary part number: H73918-02-3-2
Manufacturer: Defense Maritime Solutions, Inc.

General Description

The Bearing Assembly,stern Tube, cataloged under National Stock Number 3120-01-508-8501, is classified within Federal Supply Class 3120 (Bearings, Plain, Unmounted) of the Bearings group. The manufacturer of record is Defense Maritime Solutions, Inc.. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government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	Bearing Assembly,stern Tube
FSC / FSG	3120 — Bearings, Plain, Unmounted (FSG 31)
Manufacturers	Defense Maritime Solutions, Inc. (CAGE 0EYA6)

Technical Specifications

Parameter	Value
NSN	3120-01-508-8501
Primary Part Number	H73918-02-3-2
Item Name	Bearing Assembly,stern Tube
FSC / FSG	3120 / 31 — Bearings, Plain, Unmounted
Manufacturer	Defense Maritime Solutions, Inc.
Status	ACTIVE

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 8

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

5360-01-508-9208H73918-02-3-3 POSSIBLE MATCH

SPRING ASSY,BRDG

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

5360-01-508-9211H73918-02-3-4 POSSIBLE MATCH

SPRING ASSY,BACKING

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

5307-01-508-9346H73918-02-6-8 POSSIBLE MATCH

STUD,CONTINUOUS THREAD

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

5306-01-508-9355H73918-02-4-2 POSSIBLE MATCH

BOLT,CLOSE TOLERANCE

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

5306-01-508-9360H73918-02-7-2 POSSIBLE MATCH

BOLT,CLOSE TOLERANCE

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

5305-01-508-9381H73918-02-7-3 POSSIBLE MATCH

SCREW,CAP,HEXAGON HEAD

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

5306-01-508-9402H73918-02-6-2 POSSIBLE MATCH

BOLT,CLOSE TOLERANCE

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

5307-01-508-9432H73918-02-8-3 POSSIBLE MATCH

STUD,CONTINUOUS THREAD

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

Cross-Reference Index

Part Number	Manufacturer
H73918-02-3-2 PRIMARY	Defense Maritime Solutions, Inc. (USA)

Reference documents

Reference	Meaning
H73918-02-3-2	3/9 Design control — primary reference Wartsila Lips Inc
US73918-02 H73918-02-3-2	C/1 Advisory reference — outside the item-of-supply concept Defense Maritime Solutions, Inc.
US73918-02	D/9 Drawing number reference only Wartsila Lips Inc
US73918-02 H73918-02-3-2	5/9 Secondary reference Wartsila Lips Inc

Related Parts

5360-01-508-9208POSSIBLE MATCH

SPRING ASSY,BRDG

H73918-02-3-3

5360-01-508-9211POSSIBLE MATCH

SPRING ASSY,BACKING

H73918-02-3-4

5307-01-508-9346POSSIBLE MATCH

STUD,CONTINUOUS THREAD

H73918-02-6-8

5306-01-508-9355POSSIBLE MATCH

BOLT,CLOSE TOLERANCE

H73918-02-4-2

5306-01-508-9360POSSIBLE MATCH

BOLT,CLOSE TOLERANCE

H73918-02-7-2

5305-01-508-9381POSSIBLE MATCH

SCREW,CAP,HEXAGON HEAD

H73918-02-7-3

5306-01-508-9402POSSIBLE MATCH

BOLT,CLOSE TOLERANCE

H73918-02-6-2

5307-01-508-9432POSSIBLE MATCH

STUD,CONTINUOUS THREAD

H73918-02-8-3

Frequently Asked Questions

What is NSN 3120-01-508-8501?

NSN 3120-01-508-8501 is a Bearing Assembly,stern Tube, manufactured by Defense Maritime Solutions, Inc., classified under FSC 3120, Bearings, Plain, Unmounted. Status: active.

What part numbers are listed for NSN 3120-01-508-8501?

NSN 3120-01-508-8501 has 1 manufacturer part number on file: H73918-02-3-2 (Defense Maritime Solutions, Inc.).

What NSN replaces 3120-01-508-8501?

8 possible matches (shared part number, not a government interchangeability claim): 5360-01-508-9208, 5360-01-508-9211, 5307-01-508-9346. Verify interchangeability with system specifications before substitution.

Is NSN 3120-01-508-8501 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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