PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

D15-561UPC685Gear,idler

Northrop Grumman Systems Corporation Div Marine Systems · NSN 3020-00-146-4222 · FSC 3020 · No Item Name Available
Verified by PartsTable
NSN 3020-00-146-4222 — this item is cataloged by the U.S. Government under National Stock Number 3020-00-146-4222. Primary manufacturer part number: D15-561UPC685.
Features
  • Gear,idler — FSC 3020
  • 21 verified cross-references
  • Primary manufacturer: Northrop Grumman Systems Corporation Div Marine Systems
Applications
  • Power transmission and speed reduction
  • Rotary motion transfer
  • Torque multiplication
General Description

The Gear,idler, cataloged under National Stock Number 3020-00-146-4222, is classified within Federal Supply Class 3020 (No Item Name Available) of the Mechanical Power Transmission Equipment group. The primary manufacturer of record is Northrop Grumman Systems Corporation Div Marine Systems. This item has 21 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3020-00-146-4222
Primary Part NumberD15-561UPC685
Item NameGear,idler
FSC / FSG3020 / 30 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation Div Marine Systems
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5310-00-012-1932121932 INTERCHANGEABLE
Nut,plain,hexagon
Agco Corp Parts Opn
5950-00-024-108870-1173 INTERCHANGEABLE
Transformer,current
Department of Defense Project Manager-Mobile Electric Power
4330-00-030-2022 INTERCHANGEABLE
Filter,fluid
5315-00-234-16570900806-1 INTERCHANGEABLE
Pin,cotter
Agco Corp Parts Opn
2520-00-358-39055901 INTERCHANGEABLE
Cover
Sachs-Boge of America
3120-00-363-79624F9417 INTERCHANGEABLE
Bearing,sleeve
Caterpillar Inc Div Caterpillar Defense
5315-00-364-4941005901 INTERCHANGEABLE
Key,valve Sector
Caterpillar Inc Div Caterpillar Defense
7290-00-369-45706340-342 INTERCHANGEABLE
Hanger,trousers
Whitmor Manufacturing Co, Inc
4730-00-498-44111-4DDSS INTERCHANGEABLE
Elbow,pipe
Parker-Hannifin Corporation Dba Pneutronics Div Tube Fittings Division
4931-00-738-42855901 INTERCHANGEABLE
Temperature Standard Cell
Hart Scientific Llc
Cross-Reference Index
Part NumberManufacturer
5901 Westinghouse Electric Corp (USA)
D15-518WPC609 Westinghouse Electric Corp (USA)
D15-518UPC609 Northrop Grumman Systems Corporation Div Marine Systems (USA)
D15-561UPC685 Westinghouse Electric Corp (USA)
D15-518VPC609 Westinghouse Electric Corp (USA)
D15-518WPC609 Northrop Grumman Systems Corporation Div Marine Systems (USA)
5901 Westinghouse Electric Corp Sturtevant Div (USA)
D15-518UPC609 Westinghouse Electric Corp (USA)
D15-518VPC609 Northrop Grumman Systems Corporation Div Marine Systems (USA)
5901 Northrop Grumman Systems Corporation Div Marine Systems (USA)
D15-561PPC685 Northrop Grumman Systems Corporation Div Marine Systems (USA)
D15-561BPC685 Northrop Grumman Systems Corporation Div Marine Systems (USA)
D15-561TPC685 Westinghouse Electric Corp (USA)
D15-561TPC685 Northrop Grumman Systems Corporation Div Marine Systems (USA)
D15-561UPC685 PRIMARY Northrop Grumman Systems Corporation Div Marine Systems (USA)
D15-518BPC609 Northrop Grumman Systems Corporation Div Marine Systems (USA)
D15-518BPC609 Westinghouse Electric Corp (USA)
D15-561PPC685 Westinghouse Electric Corp (USA)
D15-518PPC609 Westinghouse Electric Corp (USA)
D15-518PPC609 Northrop Grumman Systems Corporation Div Marine Systems (USA)
Related Parts
5310-00-012-1932INTERCHANGEABLE
NUT,PLAIN,HEXAGON
121932
5950-00-024-1088INTERCHANGEABLE
TRANSFORMER,CURRENT
70-1173
4330-00-030-2022INTERCHANGEABLE
FILTER,FLUID
5315-00-234-1657INTERCHANGEABLE
PIN,COTTER
0900806-1
2520-00-358-3905INTERCHANGEABLE
COVER
5901
3120-00-363-7962INTERCHANGEABLE
BEARING,SLEEVE
4F9417
5315-00-364-4941INTERCHANGEABLE
KEY,VALVE SECTOR
005901
7290-00-369-4570INTERCHANGEABLE
HANGER,TROUSERS
6340-342
4730-00-498-4411INTERCHANGEABLE
ELBOW,PIPE
1-4DDSS
4931-00-738-4285INTERCHANGEABLE
TEMPERATURE STANDARD CELL
5901
5340-01-270-3364INTERCHANGEABLE
LEVER,MANUAL CONTROL
5901
3590-01-344-1313INTERCHANGEABLE
CLIPPER,HAIR
76059-010

Frequently Asked Questions

What is NSN 3020-00-146-4222?

NSN 3020-00-146-4222 is a Gear,idler, manufactured by Northrop Grumman Systems Corporation Div Marine Systems, classified under FSC 3020 (No Item Name Available). Status: active.

What are the part numbers for NSN 3020-00-146-4222?

NSN 3020-00-146-4222 has 21 cross-referenced part numbers: 5901 (Westinghouse Electric Corp), D15-518WPC609 (Westinghouse Electric Corp), D15-518UPC609 (Northrop Grumman Systems Corporation Div Marine Systems), D15-561UPC685 (Westinghouse Electric Corp), D15-518VPC609 (Westinghouse Electric Corp) and 16 more.

What NSN replaces 3020-00-146-4222?

There are 12 known substitutes for 3020-00-146-4222: 5310-00-012-1932, 5950-00-024-1088, 4330-00-030-2022 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of D15-561UPC685?

Key specifications for D15-561UPC685: End Item Identification: STEAM TURBINE,SHIPS PROPULSION SYSTEM. 1 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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