PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

901861-2CBearing,ball,duplex

Industrial Tectonics Bearings Corporation Dba Rbc Bearings Inc Div Industrial Tectonics Bearings · NSN 3110-01-191-3230 · FSC 3110 · No Item Name Available
Verified by PartsTable
NSN 3110-01-191-3230 — this item is cataloged by the U.S. Government under National Stock Number 3110-01-191-3230. Primary manufacturer part number: 901861-2C.
Features
  • Bearing,ball,duplex — FSC 3110
  • Material: STEEL COMP 440C OUTER RING
  • Bore Diameter: 3.0622 INCHES MINIMUM AND 3.0625 INCHES MAXIMUM IN
  • Material: STEEL CORROSION RESISTING SHIELD
  • Surface Finish: GROUND
  • Material: STEEL COMP 440C INNER RING
  • Material: OIL LUBRICATION
  • Specification/standard Data: 82577-901861 MANUFACTURERS STANDARD
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Comp 440c Outer Ring construction
General Description

The Bearing,ball,duplex, cataloged under National Stock Number 3110-01-191-3230, is classified within Federal Supply Class 3110 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Industrial Tectonics Bearings Corporation Dba Rbc Bearings Inc Div Industrial Tectonics Bearings. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 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
NSN3110-01-191-3230
Primary Part Number901861-2C
Item NameBearing,ball,duplex
FSC / FSG3110 / 31 — No Item Name Available
ManufacturerIndustrial Tectonics Bearings Corporation Dba Rbc Bearings Inc Div Industrial Tectonics Bearings
StatusACTIVE
MaterialSTEEL COMP 440C OUTER RING
Bore Diameter3.0622 INCHES MINIMUM AND 3.0625 INCHES MAXIMUM IN
MaterialSTEEL CORROSION RESISTING SHIELD
Surface FinishGROUND
MaterialSTEEL COMP 440C INNER RING
MaterialOIL LUBRICATION
Specification/standard Data82577-901861 MANUFACTURERS STANDARD
Material Document and ClassificationUNABLE TO DECODE
Style DesignatorCOUNTERBORED OUTER RINGS, NON-SEPARABLE, BACK TO BACK MOUNTING
Bearing Preload Rating90.0 POUNDS MINIMUM AND 110.0 POUNDS MAXIMUM LBS
Load DirectionANGULAR
Shield Quantity2
Overall Outside Diameter3.8746 INCHES MINIMUM AND 3.8750 INCHES MAXIMUM IN
MaterialCOTTON AND PLASTIC PHENOLIC RETAINER
Standard Tolerance DesignationABEC NO. 5T
Contact Angle15.0 DEGREES MINIMUM AND 25.0 DEGREES MAXIMUM
MaterialSTEEL COMP 440C BALL
Retainer Fabrication MethodPRESSED
Lubrication Material Document and ClassificationMIL-L-6085 MIL SPEC SINGLE MATERIAL RESPONSE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5120-00-142-3658T543 INTERCHANGEABLE
Tool,landing Gear S
The Boeing Company Div Legacy Am&m
5330-00-255-0103 INTERCHANGEABLE
Packing,preformed
Cross-Reference Index
Part NumberManufacturer
13527201 Kaydon Corporation Dba Kaydon Corp (USA)
901861-2C Raytheon Company Dba Raytheon (USA)
901861-2C PRIMARY Industrial Tectonics Bearings Corporation Dba Rbc Bearings Inc Div Industrial Tectonics Bearings (USA)
T543 Mpb Corp Div Timken Super Precision (USA)
901861-2C PRIMARY Mpb Corp Div Timken Super Precision (USA)
10107551 Nimikkeistokeskus Ncb Finland (FIN)
901861-2C PRIMARY Kaydon Corporation Dba Kaydon Corp (USA)
3TKRD49-62-A66 Mpb Corporation Dba Mpb Corp (USA)
Related Parts
5120-00-142-3658INTERCHANGEABLE
TOOL,LANDING GEAR S
T543
5330-00-255-0103INTERCHANGEABLE
PACKING,PREFORMED

Frequently Asked Questions

What is NSN 3110-01-191-3230?

NSN 3110-01-191-3230 is a Bearing,ball,duplex, manufactured by Industrial Tectonics Bearings Corporation Dba Rbc Bearings Inc Div Industrial Tectonics Bearings, classified under FSC 3110 (No Item Name Available). Status: active.

What are the part numbers for NSN 3110-01-191-3230?

NSN 3110-01-191-3230 has 8 cross-referenced part numbers: 13527201 (Kaydon Corporation Dba Kaydon Corp), 901861-2C (Raytheon Company Dba Raytheon), 901861-2C (Industrial Tectonics Bearings Corporation Dba Rbc Bearings Inc Div Industrial Tectonics Bearings), T543 (Mpb Corp Div Timken Super Precision), 901861-2C (Mpb Corp Div Timken Super Precision) and 3 more.

What NSN replaces 3110-01-191-3230?

There are 2 known substitutes for 3110-01-191-3230: 5120-00-142-3658, 5330-00-255-0103. Verify interchangeability with system specifications before substitution.

What are the specifications of 901861-2C?

Key specifications for 901861-2C: Material: STEEL COMP 440C OUTER RING; Bore Diameter: 3.0622 INCHES MINIMUM AND 3.0625 INCHES MAXIMUM IN; Material: STEEL CORROSION RESISTING SHIELD; Surface Finish: GROUND. 21 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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