PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

125C3781-2Bearing,ball,annular

Fag Bearings Corporation · NSN 3110-00-242-4866 · FSC 3110 · No Item Name Available
Verified by PartsTable
NSN 3110-00-242-4866 — this item is cataloged by the U.S. Government under National Stock Number 3110-00-242-4866. Primary manufacturer part number: 125C3781-2.
Features
  • Bearing,ball,annular — FSC 3110
  • Bore Diameter: 0.7500 INCHES NOMINAL IN
  • Internal Fit-Up Designation: STANDARD
  • Seal Quantity: 2
  • Bearing Seal Type: CONTACT
  • Standard Tolerance Designation: ABEC NO.1
  • Retainer Fabrication Method: PRESSED
  • Load Direction: RADIAL
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Comp 440c Ball construction
General Description

The Bearing,ball,annular, cataloged under National Stock Number 3110-00-242-4866, is classified within Federal Supply Class 3110 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Fag Bearings Corporation. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 19 commercial cross-references from 12 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
NSN3110-00-242-4866
Primary Part Number125C3781-2
Item NameBearing,ball,annular
FSC / FSG3110 / 31 — No Item Name Available
ManufacturerFag Bearings Corporation
StatusACTIVE
Bore Diameter0.7500 INCHES NOMINAL IN
Internal Fit-Up DesignationSTANDARD
Seal Quantity2
Bearing Seal TypeCONTACT
Standard Tolerance DesignationABEC NO.1
Retainer Fabrication MethodPRESSED
Load DirectionRADIAL
Bore ShapeSTRAIGHT
Lubrication MaterialGREASE
Surface FinishGROUND
Lubrication Material Document and ClassificationMIL-G-23827 MIL SPEC SINGLE MATERIAL RESPONSE
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE BALL
MaterialSTEEL COMP 440C BALL
Style DesignatorNON-LOADING GROOVE, NON-SEPARABLE
MaterialRUBBER SYNTHETIC SEAL
MaterialSTEEL CORROSION RESISTING RETAINER
MaterialSTEEL COMP 440C INNER RING
MaterialSTEEL COMP 440C OUTER RING
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE OUTER RING
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE INNER RING
Overall Outside Diameter1.6250 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
3110-00-001-8158 INTERCHANGEABLE
Bearing,ball,annular
3110-00-710-4936 INTERCHANGEABLE
Bearing,ball,annular
3110-01-037-40851273882-1 INTERCHANGEABLE
Bearing,ball,annular
Honeywell Intl Inc Defense Avionics Systems Former Bendix Navigation and Control Systems
Cross-Reference Index
Part NumberManufacturer
SSRI-2634DDRDA1 New Hampshire Ball Bearings Inc Div Hitech Division (USA)
3110PL0958381 Jednolity Indeks Materialowy - Uniform Material Index (POL)
10107363 Nimikkeistokeskus Ncb Finland (FIN)
125C3781-2 PRIMARY Fag Bearings Corporation (USA)
125C3781 General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA)
SR12.2GTS.K01 Fag Bearings Corporation (USA)
R12LLSS1L1 Schatz Bearing Corporation Dba Schatz Bearing Corp (USA)
EE652-2RS Koyo Bearings (JPN)
125C3781-2 PRIMARY New Hampshire Ball Bearings Inc Div Hitech Division (USA)
R12ZZST Skf Usa Inc. (USA)
125C3781-2 General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems (USA)
EE652-2RS Jtekt Corp. (JPN)
125C3781 New Hampshire Ball Bearings Inc Div Precision Division (USA)
125C3781-2 PRIMARY Skf Usa Inc. (USA)
R12ZZST20GRS Skf Usa Inc. (USA)
AS8PP Timken Co Div the Timken Company (USA)
SSRI-2634DDRDAI New Hampshire Ball Bearings Inc Div Hitech Division (USA)
SR12.2GTS.K10 Fag Bearings Corporation (USA)
SSZ99R12XR1CJ General Motors Corp Delco Moraine Ndh Div (USA)
Related Parts
3110-00-001-8158INTERCHANGEABLE
BEARING,BALL,ANNULAR
3110-00-710-4936INTERCHANGEABLE
BEARING,BALL,ANNULAR
3110-01-037-4085INTERCHANGEABLE
BEARING,BALL,ANNULAR
1273882-1

Frequently Asked Questions

What is NSN 3110-00-242-4866?

NSN 3110-00-242-4866 is a Bearing,ball,annular, manufactured by Fag Bearings Corporation, classified under FSC 3110 (No Item Name Available). Status: active.

What are the part numbers for NSN 3110-00-242-4866?

NSN 3110-00-242-4866 has 19 cross-referenced part numbers: SSRI-2634DDRDA1 (New Hampshire Ball Bearings Inc Div Hitech Division), 3110PL0958381 (Jednolity Indeks Materialowy - Uniform Material Index), 10107363 (Nimikkeistokeskus Ncb Finland), 125C3781-2 (Fag Bearings Corporation), 125C3781 (General Dynamics-Ots, Inc. Div Ordnance and Tactical Systems) and 14 more.

What NSN replaces 3110-00-242-4866?

There are 3 known substitutes for 3110-00-242-4866: 3110-00-001-8158, 3110-00-710-4936, 3110-01-037-4085. Verify interchangeability with system specifications before substitution.

What are the specifications of 125C3781-2?

Key specifications for 125C3781-2: Bore Diameter: 0.7500 INCHES NOMINAL IN; Internal Fit-Up Designation: STANDARD; Seal Quantity: 2; Bearing Seal Type: CONTACT. 22 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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