PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MS21233-12Bearing,plain,self-Aligning

Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 3120-00-916-9310 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-916-9310 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-916-9310. Primary manufacturer part number: MS21233-12.
Features
  • Bearing,plain,self-Aligning — FSC 3120
  • Bore Diameter: 0.7495 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
  • Style Designator: WITH INSERT AND/OR LINER
  • Material: PLASTIC POLYTETRAFLUOROETHYLENE RACE LINER
  • Material: STEEL COMP 440C OUTER RACE MEMBER
  • Material Document and Classification: AMS 5643 COMP 17-4 PH ASSN STD SINGLE MATERIAL RESPONSE OUTER RACE MEMBER
  • Hardness Rating: 23.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OUTER RACE MEMBER
  • Material: STEEL COMP 631 INNER MEMBER
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Plastic Polytetrafluoroethylene Race Liner construction
General Description

The Bearing,plain,self-Aligning, cataloged under National Stock Number 3120-00-916-9310, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 12 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN3120-00-916-9310
Primary Part NumberMS21233-12
Item NameBearing,plain,self-Aligning
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerMilitary Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Bore Diameter0.7495 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
Style DesignatorWITH INSERT AND/OR LINER
MaterialPLASTIC POLYTETRAFLUOROETHYLENE RACE LINER
MaterialSTEEL COMP 440C OUTER RACE MEMBER
Material Document and ClassificationAMS 5643 COMP 17-4 PH ASSN STD SINGLE MATERIAL RESPONSE OUTER RACE MEMBER
Hardness Rating23.0 ROCKWELL C MINIMUM AND 35.0 ROCKWELL C MAXIMUM OUTER RACE MEMBER
MaterialSTEEL COMP 631 INNER MEMBER
Hardness Rating55.0 ROCKWELL C MINIMUM AND 62.0 ROCKWELL C MAXIMUM INNER MEMBER
Inner Member Width0.7480 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN
Outer Member Width0.5880 INCHES MINIMUM AND 0.5980 INCHES MAXIMUM IN
Outer Member Outside Diameter1.4370 INCHES MINIMUM AND 1.4375 INCHES MAXIMUM IN
Static Radial Load Rating46400 POUNDS LBS
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 1
3120-01-104-5989MS14104-12 INTERCHANGEABLE
Bearing,plain,self-Aligning
Sae International Dba Sae International
Cross-Reference Index
Part NumberManufacturer
MS21233-12 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
BLFN12-318-1 Rbc Southwest Products, Inc. (USA)
Related Parts
3120-01-104-5989INTERCHANGEABLE
BEARING,PLAIN,SELF-ALIGNING
MS14104-12

Frequently Asked Questions

What is NSN 3120-00-916-9310?

NSN 3120-00-916-9310 is a Bearing,plain,self-Aligning, manufactured by Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 3120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3120-00-916-9310?

NSN 3120-00-916-9310 has 2 cross-referenced part numbers: MS21233-12 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), BLFN12-318-1 (Rbc Southwest Products, Inc.).

What NSN replaces 3120-00-916-9310?

There is 1 known substitute for 3120-00-916-9310: 3120-01-104-5989. Verify interchangeability with system specifications before substitution.

What are the specifications of MS21233-12?

Key specifications for MS21233-12: Bore Diameter: 0.7495 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN; Style Designator: WITH INSERT AND/OR LINER; Material: PLASTIC POLYTETRAFLUOROETHYLENE RACE LINER; Material: STEEL COMP 440C OUTER RACE MEMBER. 12 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3120-00-916-9310 still in active supply?

NSN 3120-00-916-9310 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

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