PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

AK2Bearing Unit,ball

Cubic Defense Applications, Inc. · NSN 3130-01-129-6921 · FSC 3130 · No Item Name Available
Verified by PartsTable
NSN 3130-01-129-6921 — this item is cataloged by the U.S. Government under National Stock Number 3130-01-129-6921. Primary manufacturer part number: AK2.
Features
  • Bearing Unit,ball — FSC 3130
  • 2 verified cross-references
  • Primary manufacturer: Cubic Defense Applications, Inc.
Applications
  • Rotating machinery support and alignment
  • Shaft load distribution
  • Precision spindle assemblies
General Description

The Bearing Unit,ball, cataloged under National Stock Number 3130-01-129-6921, is classified within Federal Supply Class 3130 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Cubic Defense Applications, Inc.. This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 4 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameBearing Unit,ball
FSC / FSG3130 — No Item Name Available (FSG 31)
ManufacturersCubic Defense Applications, Inc. (CAGE 94987); A and K Mfg Co Inc (CAGE 16410)
Technical Specifications
ParameterValue
NSN3130-01-129-6921
Primary Part NumberAK2
Item NameBearing Unit,ball
FSC / FSG3130 / 31 — No Item Name Available
ManufacturerCubic Defense Applications, Inc.
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 4
3110-00-183-7537MS19060-4806 INTERCHANGEABLE
Ball,bearing
American Society for Testing and Materials Dba Astm International
5895-01-131-4569AK-2 INTERCHANGEABLE
Frequency Multiplier
Scientific Components Corp Dba Mini-Circuits
8145-01-502-6258AK2 INTERCHANGEABLE
Container,collapsible,shipping
Kiplivit North America Inc
3439-01-534-1940AK-2 INTERCHANGEABLE
Welding Electrode Set
Associated Equipment Co, Inc Dba Profax Division
Cross-Reference Index
Part NumberManufacturer
AK2 Cubic Defense Applications, Inc. (USA)
AK2 A and K Mfg Co Inc (USA)
Related Parts
3110-00-183-7537INTERCHANGEABLE
BALL,BEARING
MS19060-4806
5895-01-131-4569INTERCHANGEABLE
FREQUENCY MULTIPLIER
AK-2
8145-01-502-6258INTERCHANGEABLE
CONTAINER,COLLAPSIBLE,SHIPPING
AK2
3439-01-534-1940INTERCHANGEABLE
WELDING ELECTRODE SET
AK-2

Frequently Asked Questions

What is NSN 3130-01-129-6921?

NSN 3130-01-129-6921 is a Bearing Unit,ball, manufactured by Cubic Defense Applications, Inc., classified under FSC 3130 (No Item Name Available). Status: active.

What are the part numbers for NSN 3130-01-129-6921?

NSN 3130-01-129-6921 has 2 cross-referenced part numbers: AK2 (Cubic Defense Applications, Inc.), AK2 (A and K Mfg Co Inc).

What NSN replaces 3130-01-129-6921?

There are 4 known substitutes for 3130-01-129-6921: 3110-00-183-7537, 5895-01-131-4569, 8145-01-502-6258 and 1 more. Verify interchangeability with system specifications before substitution.

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