PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

12253848Bearing,plain,self-Aligning

Rbc Bearings Incorporated Div West Trenton Division · NSN 3120-00-420-5772 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-420-5772 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-420-5772. Primary manufacturer part number: 12253848.
Features
  • Bearing,plain,self-Aligning — FSC 3120
  • Material: STEEL COMP 4140 INTERNAL OUTER MEMBER
  • Material: STEEL COMP E52100 INNER MEMBER
  • Style Designator: WITHOUT INSERT OR LINER
  • Inner Member Width: 2.6200 INCHES MINIMUM AND 2.6250 INCHES MAXIMUM IN
  • Bore Diameter: 2.9994 INCHES MINIMUM AND 3.0000 INCHES MAXIMUM IN
  • Outer Member Outside Diameter: 4.7492 INCHES MINIMUM AND 4.7500 INCHES MAXIMUM IN
  • Outer Member Width: 2.2450 INCHES MINIMUM AND 2.2500 INCHES MAXIMUM IN
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Comp 4140 Internal Outer Member construction
General Description

The Bearing,plain,self-Aligning, cataloged under National Stock Number 3120-00-420-5772, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Rbc Bearings Incorporated Div West Trenton Division. Government technical data includes 8 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN3120-00-420-5772
Primary Part Number12253848
Item NameBearing,plain,self-Aligning
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerRbc Bearings Incorporated Div West Trenton Division
StatusCANCELLED
MaterialSTEEL COMP 4140 INTERNAL OUTER MEMBER
MaterialSTEEL COMP E52100 INNER MEMBER
Style DesignatorWITHOUT INSERT OR LINER
Inner Member Width2.6200 INCHES MINIMUM AND 2.6250 INCHES MAXIMUM IN
Bore Diameter2.9994 INCHES MINIMUM AND 3.0000 INCHES MAXIMUM IN
Outer Member Outside Diameter4.7492 INCHES MINIMUM AND 4.7500 INCHES MAXIMUM IN
Outer Member Width2.2450 INCHES MINIMUM AND 2.2500 INCHES MAXIMUM IN
Static Radial Load Rating893000 POUNDS LBS
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 6
3030-00-232-597948B INTERCHANGEABLE
Belt,v
Gates Corporation
5310-00-687-7738 INTERCHANGEABLE
Washer,flat
5310-01-092-2449B4-8 INTERCHANGEABLE
Washer,flat
Roller Bearing Co of America, Inc Div Pic Design
4730-01-482-9059B-48 INTERCHANGEABLE
Pneumatic Muffler,exhaust-Intake
Hydro Engineering Innovation, Llc
6140-01-540-0000 INTERCHANGEABLE
Battery Set
5365-01-663-2021419366-8 INTERCHANGEABLE
Spacer,sleeve
Raytheon Company Dba Raytheon
Cross-Reference Index
Part NumberManufacturer
B48 Rbc Bearings Incorporated Div West Trenton Division (USA)
30SF48 Timken Co Div the Timken Company (USA)
30SF48 Timken Aerospace, Inc Dba Torrington Product (USA)
0RB48SA Rbc Bearings Incorporated Div West Trenton Division (USA)
B48L Rbc Bearings Incorporated Div West Trenton Division (USA)
12253848 U S Army Tank Automotive Command Amsta-Im-Mm (USA)
GEZ300ES Skf Usa Inc. (USA)
12253848 PRIMARY Rbc Bearings Incorporated Div West Trenton Division (USA)
12253848 PRIMARY Timken Co Div the Timken Company (USA)
Related Parts
3030-00-232-5979INTERCHANGEABLE
BELT,V
48B
5310-00-687-7738INTERCHANGEABLE
WASHER,FLAT
5310-01-092-2449INTERCHANGEABLE
WASHER,FLAT
B4-8
4730-01-482-9059INTERCHANGEABLE
PNEUMATIC MUFFLER,EXHAUST-INTAKE
B-48
6140-01-540-0000INTERCHANGEABLE
BATTERY SET
5365-01-663-2021INTERCHANGEABLE
SPACER,SLEEVE
419366-8

Frequently Asked Questions

What is NSN 3120-00-420-5772?

NSN 3120-00-420-5772 is a Bearing,plain,self-Aligning, manufactured by Rbc Bearings Incorporated Div West Trenton Division, classified under FSC 3120 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3120-00-420-5772?

NSN 3120-00-420-5772 has 9 cross-referenced part numbers: B48 (Rbc Bearings Incorporated Div West Trenton Division), 30SF48 (Timken Co Div the Timken Company), 30SF48 (Timken Aerospace, Inc Dba Torrington Product), 0RB48SA (Rbc Bearings Incorporated Div West Trenton Division), B48L (Rbc Bearings Incorporated Div West Trenton Division) and 4 more.

What NSN replaces 3120-00-420-5772?

There are 6 known substitutes for 3120-00-420-5772: 3030-00-232-5979, 5310-00-687-7738, 5310-01-092-2449 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 12253848?

Key specifications for 12253848: Material: STEEL COMP 4140 INTERNAL OUTER MEMBER; Material: STEEL COMP E52100 INNER MEMBER; Style Designator: WITHOUT INSERT OR LINER; Inner Member Width: 2.6200 INCHES MINIMUM AND 2.6250 INCHES MAXIMUM IN. 9 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3120-00-420-5772 still in active supply?

NSN 3120-00-420-5772 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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