PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

R-656 PC51Bearing,sleeve

Marine Diesel, Inc. Dba Marine Diesel · NSN 3120-00-674-1725 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-674-1725 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-674-1725. Primary manufacturer part number: R-656 PC51.
Features
  • Bearing,sleeve — FSC 3120
  • 7 verified cross-references
  • Primary manufacturer: Marine Diesel, Inc. Dba Marine Diesel
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
General Description

The Bearing,sleeve, cataloged under National Stock Number 3120-00-674-1725, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Marine Diesel, Inc. Dba Marine Diesel. This item has 7 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameBearing,sleeve
FSC / FSG3120 — No Item Name Available (FSG 31)
ManufacturersCircor Naval Solutions Llc Dba Warren Pumps (CAGE 63857); Marine Diesel, Inc. Dba Marine Diesel (CAGE 59155); Ram Enterprises Inc Fesco Div (CAGE 34715); Euramco Safety Inc (CAGE 52081)
Technical Specifications
ParameterValue
NSN3120-00-674-1725
Primary Part NumberR-656 PC51
Item NameBearing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerMarine Diesel, Inc. Dba Marine Diesel
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
3110-00-156-1711 INTERCHANGEABLE
Bearing,ball,thrust
5310-00-186-0987 INTERCHANGEABLE
Washer,key
5950-00-280-4571 INTERCHANGEABLE
Transformer,power
5999-01-322-2529W34 INTERCHANGEABLE
Heater,thermal Release
Rockwell Automation, Inc. Dba Rockwell Automation
Cross-Reference Index
Part NumberManufacturer
R345PC13 Circor Naval Solutions Llc Dba Warren Pumps (USA)
R-656 PC51 PRIMARY Marine Diesel, Inc. Dba Marine Diesel (USA)
W34 Circor Naval Solutions Llc Dba Warren Pumps (USA)
55-22053-33 Ram Enterprises Inc Fesco Div (USA)
55-22053-33 Euramco Safety Inc (USA)
674-1725 Marine Diesel, Inc. Dba Marine Diesel (USA)
R-656 PC51 Circor Naval Solutions Llc Dba Warren Pumps (USA)
Related Parts
3110-00-156-1711INTERCHANGEABLE
BEARING,BALL,THRUST
5310-00-186-0987INTERCHANGEABLE
WASHER,KEY
5950-00-280-4571INTERCHANGEABLE
TRANSFORMER,POWER
5999-01-322-2529INTERCHANGEABLE
HEATER,THERMAL RELEASE
W34

Frequently Asked Questions

What is NSN 3120-00-674-1725?

NSN 3120-00-674-1725 is a Bearing,sleeve, manufactured by Marine Diesel, Inc. Dba Marine Diesel, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-674-1725?

NSN 3120-00-674-1725 has 7 cross-referenced part numbers: R345PC13 (Circor Naval Solutions Llc Dba Warren Pumps), R-656 PC51 (Marine Diesel, Inc. Dba Marine Diesel), W34 (Circor Naval Solutions Llc Dba Warren Pumps), 55-22053-33 (Ram Enterprises Inc Fesco Div), 55-22053-33 (Euramco Safety Inc) and 2 more.

What NSN replaces 3120-00-674-1725?

There are 4 known substitutes for 3120-00-674-1725: 3110-00-156-1711, 5310-00-186-0987, 5950-00-280-4571 and 1 more. Verify interchangeability with system specifications before substitution.

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