PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

1M3669Bushing,sleeve

Caterpillar Inc Div Caterpillar Defense · NSN 3120-00-950-6575 · FSC 3120 · No Item Name Available
Verified by PartsTable
NSN 3120-00-950-6575 — this item is cataloged by the U.S. Government under National Stock Number 3120-00-950-6575. Primary manufacturer part number: 1M3669.
Features
  • Bushing,sleeve — FSC 3120
  • Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES
  • Material: STEEL OVERALL
  • Body Inside Diameter: 1.9060 INCHES NOMINAL IN
  • Body Outside Diameter: 2.8120 INCHES NOMINAL IN
  • Features Provided: CASEHARDENED
  • Corner Shape: SQUARE ALL CORNERS
  • 2 verified cross-references
Applications
  • Applications requiring Steel Overall construction
General Description

The Bushing,sleeve, cataloged under National Stock Number 3120-00-950-6575, is classified within Federal Supply Class 3120 (No Item Name Available) of the Bearings group. The primary manufacturer of record is Caterpillar Inc Div Caterpillar Defense. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 5 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN3120-00-950-6575
Primary Part Number1M3669
Item NameBushing,sleeve
FSC / FSG3120 / 31 — No Item Name Available
ManufacturerCaterpillar Inc Div Caterpillar Defense
StatusACTIVE
Style DesignatorSOLID, PLAIN, NO OUTSIDE FLANGES
MaterialSTEEL OVERALL
Body Inside Diameter1.9060 INCHES NOMINAL IN
Body Outside Diameter2.8120 INCHES NOMINAL IN
Features ProvidedCASEHARDENED
Corner ShapeSQUARE ALL CORNERS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 5
5950-00-417-4376373304-1 INTERCHANGEABLE
Transformer,power
Raytheon Company Dba Raytheon Co
5330-01-009-705215403 INTERCHANGEABLE
Gasket
Forenta Lp
8145-01-088-464715403 INTERCHANGEABLE
Container,rotor Assembly
Naval Inventory Control Point
6530-01-467-4830 INTERCHANGEABLE
Adapter,sterrad
5935-01-470-151915403 INTERCHANGEABLE
Connector,receptacle,electrical
Generac Mobile Products, Llc
Cross-Reference Index
Part NumberManufacturer
1M3669 PRIMARY Caterpillar Inc Div Caterpillar Defense (USA)
15403 Intertractor America Corp (USA)
Related Parts
5950-00-417-4376INTERCHANGEABLE
TRANSFORMER,POWER
373304-1
5330-01-009-7052INTERCHANGEABLE
GASKET
15403
8145-01-088-4647INTERCHANGEABLE
CONTAINER,ROTOR ASSEMBLY
15403
6530-01-467-4830INTERCHANGEABLE
ADAPTER,STERRAD
5935-01-470-1519INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
15403

Frequently Asked Questions

What is NSN 3120-00-950-6575?

NSN 3120-00-950-6575 is a Bushing,sleeve, manufactured by Caterpillar Inc Div Caterpillar Defense, classified under FSC 3120 (No Item Name Available). Status: active.

What are the part numbers for NSN 3120-00-950-6575?

NSN 3120-00-950-6575 has 2 cross-referenced part numbers: 1M3669 (Caterpillar Inc Div Caterpillar Defense), 15403 (Intertractor America Corp).

What NSN replaces 3120-00-950-6575?

There are 5 known substitutes for 3120-00-950-6575: 5950-00-417-4376, 5330-01-009-7052, 8145-01-088-4647 and 2 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 1M3669?

Key specifications for 1M3669: Style Designator: SOLID, PLAIN, NO OUTSIDE FLANGES; Material: STEEL OVERALL; Body Inside Diameter: 1.9060 INCHES NOMINAL IN; Overall Length: 6.9690 INCHES NOMINAL IN. 7 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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