PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

5M1066-002Transformer,power Autotransforme

The Boeing Company Div Defense · NSN 5950-00-421-0725 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-421-0725 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-421-0725. Primary manufacturer part number: 5M1066-002.
Features
  • Transformer,power Autotransforme — FSC 5950
  • Winding Operating Voltage: 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE WINDING
  • Winding Operating Voltage: 11.00 AC VOLTS MINIMUM AND 115.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
  • Reliability Indicator: NOT ESTABLISHED
  • Frequency Rating: 400.0 HERTZ MAXIMUM SINGLE COMPONENT
  • Body Outside Diameter: 2.250 INCHES NOMINAL IN
  • Winding Operating Current: 2.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
  • Winding Power Rating: 230.0 VOLTS-AMPERES SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,power Autotransforme, cataloged under National Stock Number 5950-00-421-0725, is classified within Federal Supply Class 5950 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is The Boeing Company Div Defense. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5950-00-421-0725
Primary Part Number5M1066-002
Item NameTransformer,power Autotransforme
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerThe Boeing Company Div Defense
StatusCANCELLED
Winding Operating Voltage115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE WINDING
Winding Operating Voltage11.00 AC VOLTS MINIMUM AND 115.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Reliability IndicatorNOT ESTABLISHED
Frequency Rating400.0 HERTZ MAXIMUM SINGLE COMPONENT
Body Outside Diameter2.250 INCHES NOMINAL IN
Winding Operating Current2.0 MILLIAMPERES AC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Winding Power Rating230.0 VOLTS-AMPERES SINGLE COMPONENT SINGLE PRIMARY OUTPUT
Thread Series DesignatorUNEF SINGLE GROUP
Nominal Thread Size0.375 INCHES SINGLE GROUP IN
Winding Function and Quantity1 PRIMARY, VARIABLE AUTOTRANSFORMER TYPE SINGLE COMPONENT
Terminal Type and Quantity3 WIRE LEAD
Input-Output Phase RelationshipSINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT
Thread Quantity Per Inch32 SINGLE GROUP
Inclosure TypeFULLY INCLOSED
Mounting MethodTHREADED BUSHING SINGLE GROUP
Body Length2.250 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 12
4810-00-164-583926465 INTERCHANGEABLE
Seat,valve
Hamilton Sundstrand Corporation Dba Collins Aerospace
7035-00-483-6617 INTERCHANGEABLE
Picker Assy
6240-00-504-2389DFY INTERCHANGEABLE
Lamp,incandescent
Gte Products Corp Sylvania Miniature Lighting Div
1650-00-529-447726400-A INTERCHANGEABLE
Filter,fluid
Purolator Facet Inc. Div Parker Aerospace Filtration Division Dba Purolator Facet, in
5307-00-637-085613988 INTERCHANGEABLE
Stud,shouldered
Budd Co the
1005-00-731-0869 INTERCHANGEABLE
Pin,firing
5950-00-787-204026465 INTERCHANGEABLE
Transformer,power
Marathonnorco Aerospace, Inc. Dba Marathon Power Technologies Company
5310-00-837-394651378 INTERCHANGEABLE
Washer,flat
Page Chester Ltd Dba Cooperative Industries Div Cooperative Industries Aerospace Defense
4820-01-057-2022428363 INTERCHANGEABLE
Disk,rupturable
Tyco Fire Products Lp
5950-01-094-720926400 INTERCHANGEABLE
Transformer
Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit
Cross-Reference Index
Part NumberManufacturer
26400 Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems (USA)
5M1066-002 PRIMARY The Boeing Company Div Defense (USA)
5-1378 Superior Electric Holding Group Llc Div Specialty Product Technologies (USA)
53G978163-15 The Boeing Company Div Defense (USA)
26465 Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems (USA)
5M1066-004 The Boeing Company Div Defense (USA)
26465 K and P Foundry (USA)
Related Parts
4810-00-164-5839INTERCHANGEABLE
SEAT,VALVE
26465
7035-00-483-6617INTERCHANGEABLE
PICKER ASSY
6240-00-504-2389INTERCHANGEABLE
LAMP,INCANDESCENT
DFY
1650-00-529-4477INTERCHANGEABLE
FILTER,FLUID
26400-A
5307-00-637-0856INTERCHANGEABLE
STUD,SHOULDERED
13988
1005-00-731-0869INTERCHANGEABLE
PIN,FIRING
5950-00-787-2040INTERCHANGEABLE
TRANSFORMER,POWER
26465
5310-00-837-3946INTERCHANGEABLE
WASHER,FLAT
51378
4820-01-057-2022INTERCHANGEABLE
DISK,RUPTURABLE
428363
5950-01-094-7209INTERCHANGEABLE
TRANSFORMER
26400
4720-01-195-8691INTERCHANGEABLE
HOSE,PREFORMED
4274-44
6250-01-237-6601INTERCHANGEABLE
SOCKET,LAMP
51378

Frequently Asked Questions

What is NSN 5950-00-421-0725?

NSN 5950-00-421-0725 is a Transformer,power Autotransforme, manufactured by The Boeing Company Div Defense, classified under FSC 5950 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5950-00-421-0725?

NSN 5950-00-421-0725 has 7 cross-referenced part numbers: 26400 (Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems), 5M1066-002 (The Boeing Company Div Defense), 5-1378 (Superior Electric Holding Group Llc Div Specialty Product Technologies), 53G978163-15 (The Boeing Company Div Defense), 26465 (Oeco, Llc Dba Pacific Scientific Oeco Div Fire Safety and Power Systems) and 2 more.

What NSN replaces 5950-00-421-0725?

There are 12 known substitutes for 5950-00-421-0725: 4810-00-164-5839, 7035-00-483-6617, 6240-00-504-2389 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 5M1066-002?

Key specifications for 5M1066-002: Winding Operating Voltage: 115.00 AC VOLTS NOMINAL SINGLE COMPONENT SINGLE WINDING; Winding Operating Voltage: 11.00 AC VOLTS MINIMUM AND 115.00 AC VOLTS MAXIMUM SINGLE COMPONENT SINGLE PRIMARY OUTPUT; Reliability Indicator: NOT ESTABLISHED; Frequency Rating: 400.0 HERTZ MAXIMUM SINGLE COMPONENT. 16 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5950-00-421-0725 still in active supply?

NSN 5950-00-421-0725 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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