PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

3251Bearing,washer,thrust

Manitowoc Engineering Co Division of the Manitowoc Co Inc · NSN 3120-00-378-9717 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-378-9717 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-378-9717. Primary manufacturer part number: 3251.
Features
  • Bearing,washer,thrust — FSC 3120
  • Style Designator: ROUND
  • Center Hole Keyway Depth: 0.1250 INCHES NOMINAL IN
  • Lubrication Feature: GROOVE FLAT BEARING SURFACE
  • Cross-Sectional Shape Style: RECTANGULAR
  • Material: COPPER ALLOY 937 OVERALL
  • Center Hole Shape Style: ROUND W/KEYWAY
  • Outside Diameter: 6.0000 INCHES NOMINAL IN
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Structural fastening and assembly
  • Equipment mounting
General Description

The Bearing,washer,thrust, cataloged under National Stock Number 3120-00-378-9717, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Manitowoc Engineering Co Division of the Manitowoc Co Inc. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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
NSN3120-00-378-9717
Primary Part Number3251
Item NameBearing,washer,thrust
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerManitowoc Engineering Co Division of the Manitowoc Co Inc
StatusACTIVE
Style DesignatorROUND
Center Hole Keyway Depth0.1250 INCHES NOMINAL IN
Lubrication FeatureGROOVE FLAT BEARING SURFACE
Cross-Sectional Shape StyleRECTANGULAR
MaterialCOPPER ALLOY 937 OVERALL
Center Hole Shape StyleROUND W/KEYWAY
Outside Diameter6.0000 INCHES NOMINAL IN
Material Document and ClassificationSAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL
Center Hole Keyway Quantity2
Diameter2.9375 INCHES NOMINAL IN
Corner ShapeSQUARE ALL CORNERS
Overall Thickness0.2500 INCHES NOMINAL IN
Center Hole Keyway Width0.3750 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5342-00-218-5906 INTERCHANGEABLE
Cap,filler Opening
4820-00-239-29913251 INTERCHANGEABLE
Valve,safety Relief
Tactair Fluid Controls Inc
5950-00-393-1514SM-B-78757 INTERCHANGEABLE
Transformer,radio Frequency
Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir
8010-00-431-6213 INTERCHANGEABLE
Remover,paint
3110-00-554-5968 INTERCHANGEABLE
Bearing,ball,annular
3120-00-633-0821204-030-788-1 INTERCHANGEABLE
Roller,linear-Rotary Motion
Bell Textron Inc
5815-00-714-15463251 INTERCHANGEABLE
Rod
Marine Corps Systems Command Div Marine Corps Systems Command Technical Data Repository Customer Service
8010-00-815-2970STRIPPER 11-001GL INTERCHANGEABLE
Remover,paint
Crest Industrial Chemicals Inc
6920-00-894-7381 INTERCHANGEABLE
Drum Assembly
2915-00-985-47493251 INTERCHANGEABLE
Poppet,fuel Nozzle
Collins Engine Nozzles, Inc
Cross-Reference Index
Part NumberManufacturer
3251C Manitowoc Engineering Co Division of the Manitowoc Co Inc (USA)
3251 PRIMARY Manitowoc Engineering Co Division of the Manitowoc Co Inc (USA)
Related Parts
5342-00-218-5906INTERCHANGEABLE
CAP,FILLER OPENING
4820-00-239-2991INTERCHANGEABLE
VALVE,SAFETY RELIEF
3251
5950-00-393-1514INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
SM-B-78757
8010-00-431-6213INTERCHANGEABLE
REMOVER,PAINT
3110-00-554-5968INTERCHANGEABLE
BEARING,BALL,ANNULAR
3120-00-633-0821INTERCHANGEABLE
ROLLER,LINEAR-ROTARY MOTION
204-030-788-1
5815-00-714-1546INTERCHANGEABLE
ROD
3251
8010-00-815-2970INTERCHANGEABLE
REMOVER,PAINT
STRIPPER 11-001GL
6920-00-894-7381INTERCHANGEABLE
DRUM ASSEMBLY
2915-00-985-4749INTERCHANGEABLE
POPPET,FUEL NOZZLE
3251
5325-01-079-7431INTERCHANGEABLE
GROMMET,NONMETALLIC
3251
9320-01-083-0463INTERCHANGEABLE
RUBBER SHEET,SOLID

Frequently Asked Questions

What is NSN 3120-00-378-9717?

NSN 3120-00-378-9717 is a Bearing,washer,thrust, manufactured by Manitowoc Engineering Co Division of the Manitowoc Co Inc, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-378-9717?

NSN 3120-00-378-9717 has 2 cross-referenced part numbers: 3251C (Manitowoc Engineering Co Division of the Manitowoc Co Inc), 3251 (Manitowoc Engineering Co Division of the Manitowoc Co Inc).

What NSN replaces 3120-00-378-9717?

There are 12 known substitutes for 3120-00-378-9717: 5342-00-218-5906, 4820-00-239-2991, 5950-00-393-1514 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 3251?

Key specifications for 3251: Style Designator: ROUND; Center Hole Keyway Depth: 0.1250 INCHES NOMINAL IN; Lubrication Feature: GROOVE FLAT BEARING SURFACE; Cross-Sectional Shape Style: RECTANGULAR. 13 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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