PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

121Bearing,ball,annular

Hf Group Inc Dba Hf Group Inc · NSN 3110-00-191-8442 · FSC 3110 · No Item Name Available
Verified by PartsTable
NSN 3110-00-191-8442 — this item is cataloged by the U.S. Government under National Stock Number 3110-00-191-8442. Primary manufacturer part number: 121.
Features
  • Bearing,ball,annular — FSC 3110
  • Overall Outside Diameter: 1.1240 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM IN
  • Retainer Fabrication Method: MOLDED
  • Load Direction: RADIAL
  • Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE BALL
  • Style Designator: NON-LOADING GROOVE, NON-SEPARABLE
  • Material Document and Classification: 663MATT2BHDST0316 FED STD SINGLE MATERIAL RESPONSE INNER RING
  • Material: STEEL COMP 316 BALL
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
  • Applications requiring Steel Comp 316 Ball construction
General Description

The Bearing,ball,annular, cataloged under National Stock Number 3110-00-191-8442, is classified within Federal Supply Class 3110 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Hf Group Inc Dba Hf Group Inc. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN3110-00-191-8442
Primary Part Number121
Item NameBearing,ball,annular
FSC / FSG3110 / 31 — No Item Name Available
ManufacturerHf Group Inc Dba Hf Group Inc
StatusCANCELLED
Overall Outside Diameter1.1240 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM IN
Retainer Fabrication MethodMOLDED
Load DirectionRADIAL
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE BALL
Style DesignatorNON-LOADING GROOVE, NON-SEPARABLE
Material Document and Classification663MATT2BHDST0316 FED STD SINGLE MATERIAL RESPONSE INNER RING
MaterialSTEEL COMP 316 BALL
MaterialSTEEL COMP 316 INNER RING
MaterialSTEEL COMP 316 INNER RING
Material Document and Classification663MATT2BHDST0316 FED STD SINGLE MATERIAL RESPONSE INNER RING
Surface FinishUNGROUND
Style DesignatorNON-LOADING GROOVE, NON-SEPARABLE
Bore ShapeSTRAIGHT
Bore ShapeSTRAIGHT
Load DirectionRADIAL
Internal Fit-Up DesignationLOOSE
Material Document and Classification66 FED STD SINGLE MATERIAL RESPONSE OUTER RING
Bore Diameter0.5000 INCHES MINIMUM AND 0.5010 INCHES MAXIMUM IN
MaterialPLASTIC RETAINER
Internal Fit-Up DesignationLOOSE
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 9
6625-00-017-8669ME295U INTERCHANGEABLE
Analyzer,spectrum
Joint Electronics Type Designation System
3110-00-156-669712 INTERCHANGEABLE
Bearing,ball,annular
Mcgill Manufacturing Co, Inc
3455-00-293-3560 INTERCHANGEABLE
File,rotary
5950-00-345-9285 INTERCHANGEABLE
Coil,electrical
4730-00-517-8056121A INTERCHANGEABLE
Trap,steam
Hartford Compressors Inc
6625-00-649-49581120-0009 INTERCHANGEABLE
Meter,replacement
Keysight Technologies Inc
6625-00-806-39939163426 INTERCHANGEABLE
Meter,multiple Scale
Us Army Aviation and Missile Command
6625-01-176-8286121A INTERCHANGEABLE
Generator,sweep
Fluke Biomedical Corporation
5935-01-412-6457121A INTERCHANGEABLE
Adapter,connector
Marinco Shore Power Systems
Cross-Reference Index
Part NumberManufacturer
121 PRIMARY Hf Group Inc Dba Hf Group Inc (USA)
121A Hf Group Inc Dba Hf Group Inc (USA)
L105 Hartford Bearing Co a Virginia Industries Inc Co (USA)
Related Parts
6625-00-017-8669INTERCHANGEABLE
ANALYZER,SPECTRUM
ME295U
3110-00-156-6697INTERCHANGEABLE
BEARING,BALL,ANNULAR
12
3455-00-293-3560INTERCHANGEABLE
FILE,ROTARY
5950-00-345-9285INTERCHANGEABLE
COIL,ELECTRICAL
4730-00-517-8056INTERCHANGEABLE
TRAP,STEAM
121A
6625-00-649-4958INTERCHANGEABLE
METER,REPLACEMENT
1120-0009
6625-00-806-3993INTERCHANGEABLE
METER,MULTIPLE SCALE
9163426
6625-01-176-8286INTERCHANGEABLE
GENERATOR,SWEEP
121A
5935-01-412-6457INTERCHANGEABLE
ADAPTER,CONNECTOR
121A

Frequently Asked Questions

What is NSN 3110-00-191-8442?

NSN 3110-00-191-8442 is a Bearing,ball,annular, manufactured by Hf Group Inc Dba Hf Group Inc, classified under FSC 3110 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 3110-00-191-8442?

NSN 3110-00-191-8442 has 3 cross-referenced part numbers: 121 (Hf Group Inc Dba Hf Group Inc), 121A (Hf Group Inc Dba Hf Group Inc), L105 (Hartford Bearing Co a Virginia Industries Inc Co).

What NSN replaces 3110-00-191-8442?

There are 9 known substitutes for 3110-00-191-8442: 6625-00-017-8669, 3110-00-156-6697, 3455-00-293-3560 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 121?

Key specifications for 121: Overall Outside Diameter: 1.1240 INCHES MINIMUM AND 1.1250 INCHES MAXIMUM IN; Retainer Fabrication Method: MOLDED; Load Direction: RADIAL; Material Document and Classification: 66 FED STD SINGLE MATERIAL RESPONSE BALL. 23 total characteristics are documented in the Federal Logistics Information System.

Is NSN 3110-00-191-8442 still in active supply?

NSN 3110-00-191-8442 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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