PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

820-4551390Bearing,plain,self-Aligning

Northrop Grumman Systems Corporation Div Marine Systems · NSN 3120-01-062-6522 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-01-062-6522 — this item is cataloged by the U.S. Government under National Stock Number 3120-01-062-6522. Primary manufacturer part number: 820-4551390.
Features
  • Bearing,plain,self-Aligning — FSC 3120
  • Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
  • Criticality Code Justification: ZZZY
  • 3 verified cross-references
  • Primary manufacturer: Northrop Grumman Systems Corporation Div Marine Systems
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
General Description

The Bearing,plain,self-Aligning, cataloged under National Stock Number 3120-01-062-6522, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Northrop Grumman Systems Corporation Div Marine Systems. Government technical data includes 2 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-01-062-6522
Primary Part Number820-4551390
Item NameBearing,plain,self-Aligning
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerNorthrop Grumman Systems Corporation Div Marine Systems
StatusACTIVE
Reference Number Differentiating CharacteristicsMATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.
Criticality Code JustificationZZZY
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
5905-00-049-4963115762 INTERCHANGEABLE
Resistor Set,matched
Kearfott Corporation Div Guidance and Navigation Division
5985-00-166-0810TS645-419 INTERCHANGEABLE
Waveguide Assembly
Microwave Engineering Corporation
2540-01-252-8534WM120-2 INTERCHANGEABLE
Cushion,seat Back,vehicular
The Wise Company Llc
Cross-Reference Index
Part NumberManufacturer
820-4551390 Northrop Grumman Systems Corporation Div Marine Systems (USA)
820-4551390H01 Naval Sea Systems Command (USA)
1-1576-2 Roller Bearing Company of America, Inc. (USA)
Related Parts
5905-00-049-4963INTERCHANGEABLE
RESISTOR SET,MATCHED
115762
5985-00-166-0810INTERCHANGEABLE
WAVEGUIDE ASSEMBLY
TS645-419
2540-01-252-8534INTERCHANGEABLE
CUSHION,SEAT BACK,VEHICULAR
WM120-2

Frequently Asked Questions

What is NSN 3120-01-062-6522?

NSN 3120-01-062-6522 is a Bearing,plain,self-Aligning, manufactured by Northrop Grumman Systems Corporation Div Marine Systems, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-01-062-6522?

NSN 3120-01-062-6522 has 3 cross-referenced part numbers: 820-4551390 (Northrop Grumman Systems Corporation Div Marine Systems), 820-4551390H01 (Naval Sea Systems Command), 1-1576-2 (Roller Bearing Company of America, Inc.).

What NSN replaces 3120-01-062-6522?

There are 3 known substitutes for 3120-01-062-6522: 5905-00-049-4963, 5985-00-166-0810, 2540-01-252-8534. Verify interchangeability with system specifications before substitution.

What are the specifications of 820-4551390?

Key specifications for 820-4551390: Reference Number Differentiating Characteristics: MATERIAL WILL BE IN ACCORDANCE WITH NAVICP MECH; ACTIVITY HX QUALITY CONTROL, MANUFACTURING AND TESTING SPECIFICATIONS.; Criticality Code Justification: ZZZY. 2 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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