PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

GB520ES24Bearing,plain,self-Aligning

U S Bearings · NSN 3120-00-765-2030 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-765-2030 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-765-2030. Primary manufacturer part number: GB520ES24.
Features
  • Bearing,plain,self-Aligning — FSC 3120
  • Inner Member Width: 1.8730 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN
  • Surface Treatment: CHROMIUM INNER MEMBER
  • Style Designator: WITH INSERT AND/OR LINER WITH STAKING GROOVE
  • Material: STEEL COMP 4340 OR STEEL COMP 630 OR STEEL COMP 410 INNER MEMBER
  • Hardness Rating: 23.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OUTER RACE MEMBER
  • Material: PLASTIC POLYTETRAFLUOROETHYLENE RACE LINER
  • Hardness Rating: 39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM INNER MEMBER
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Comp 4340 or Steel Comp 630 or Steel Comp 410 Inner Member construction
General Description

The Bearing,plain,self-Aligning, cataloged under National Stock Number 3120-00-765-2030, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is U S Bearings. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-00-765-2030
Primary Part NumberGB520ES24
Item NameBearing,plain,self-Aligning
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerU S Bearings
StatusACTIVE
Inner Member Width1.8730 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN
Surface TreatmentCHROMIUM INNER MEMBER
Style DesignatorWITH INSERT AND/OR LINER WITH STAKING GROOVE
MaterialSTEEL COMP 4340 OR STEEL COMP 630 OR STEEL COMP 410 INNER MEMBER
Hardness Rating23.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OUTER RACE MEMBER
MaterialPLASTIC POLYTETRAFLUOROETHYLENE RACE LINER
Hardness Rating39.0 ROCKWELL C MINIMUM AND 42.0 ROCKWELL C MAXIMUM INNER MEMBER
Outer Member Width1.0660 INCHES MINIMUM AND 1.0760 INCHES MAXIMUM IN
Bore Diameter1.4995 INCHES MINIMUM AND 1.5000 INCHES MAXIMUM IN
Static Radial Load Rating184500 POUNDS LBS
Outer Member Outside Diameter2.7807 INCHES MINIMUM AND 2.7812 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5996-00-615-608376751 INTERCHANGEABLE
Amplifier Subassembly
L3harris Technologies, Inc Div Space & Airborne Systems
6250-00-866-7472 INTERCHANGEABLE
Lampholder
Cross-Reference Index
Part NumberManufacturer
GB520BT24 Northrop Grumman Systems Corporation (USA)
KSC122600P-5 Kamatics Corporation (USA)
HSP24TL104 U S Bearings (USA)
GB520ES24 PRIMARY U S Bearings (USA)
GB520ES24 PRIMARY New Hampshire Ball Bearings Inc Div Astro Division (USA)
KSBN24-25 Sargent Aerospace & Defense, Llc Dba Kahr Bearings (USA)
GB520ES24 PRIMARY Kamatics Corporation (USA)
GB520ES24 PRIMARY Rbc Transport Dynamics Corp Div Rbc Transport Dynamics (USA)
ADB24-302 New Hampshire Ball Bearings Inc Div Astro Division (USA)
76751 Rbc Transport Dynamics Corp Div Rbc Transport Dynamics (USA)
03-826-24E-005 Rbc Transport Dynamics Corp Div Rbc Transport Dynamics (USA)
GB520ES24 Northrop Grumman Systems Corporation (USA)
Related Parts
5996-00-615-6083INTERCHANGEABLE
AMPLIFIER SUBASSEMBLY
76751
6250-00-866-7472INTERCHANGEABLE
LAMPHOLDER

Frequently Asked Questions

What is NSN 3120-00-765-2030?

NSN 3120-00-765-2030 is a Bearing,plain,self-Aligning, manufactured by U S Bearings, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-765-2030?

NSN 3120-00-765-2030 has 12 cross-referenced part numbers: GB520BT24 (Northrop Grumman Systems Corporation), KSC122600P-5 (Kamatics Corporation), HSP24TL104 (U S Bearings), GB520ES24 (U S Bearings), GB520ES24 (New Hampshire Ball Bearings Inc Div Astro Division) and 7 more.

What NSN replaces 3120-00-765-2030?

There are 2 known substitutes for 3120-00-765-2030: 5996-00-615-6083, 6250-00-866-7472. Verify interchangeability with system specifications before substitution.

What are the specifications of GB520ES24?

Key specifications for GB520ES24: Inner Member Width: 1.8730 INCHES MINIMUM AND 1.8750 INCHES MAXIMUM IN; Surface Treatment: CHROMIUM INNER MEMBER; Style Designator: WITH INSERT AND/OR LINER WITH STAKING GROOVE; Material: STEEL COMP 4340 OR STEEL COMP 630 OR STEEL COMP 410 INNER MEMBER. 12 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com