PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

2781Reactor

Transformer Technicians Inc · NSN 5950-00-646-2629 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-646-2629 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-646-2629. Primary manufacturer part number: 2781.
Features
  • Reactor — FSC 5950
  • Frequency Rating: 800.0 HERTZ NOMINAL SINGLE COMPONENT
  • Reliability Indicator: NOT ESTABLISHED
  • Nominal Thread Size: 0.138 INCHES SINGLE GROUP IN
  • Inductance Type: FIXED
  • Body Length: 1.500 INCHES NOMINAL IN
  • Inclosure Type: HERMETICALLY SEALED
  • Rating Method: ELECTRICAL SINGLE COMPONENT SINGLE WINDING
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Reactor, cataloged under National Stock Number 5950-00-646-2629, 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 Transformer Technicians Inc. Government technical data includes 19 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-646-2629
Primary Part Number2781
Item NameReactor
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerTransformer Technicians Inc
StatusACTIVE
Frequency Rating800.0 HERTZ NOMINAL SINGLE COMPONENT
Reliability IndicatorNOT ESTABLISHED
Nominal Thread Size0.138 INCHES SINGLE GROUP IN
Inductance TypeFIXED
Body Length1.500 INCHES NOMINAL IN
Inclosure TypeHERMETICALLY SEALED
Rating MethodELECTRICAL SINGLE COMPONENT SINGLE WINDING
Mounting MethodTHREADED STUD(S) SINGLE GROUP
Distance Between Mounting Facility Centers1.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Mounting Facility Quantity2 SINGLE GROUP
Inductance Rating1.40 HENRY MINIMUM SINGLE COMPONENT SINGLE WINDING
Thread Quantity Per Inch32 SINGLE GROUP
Winding Quantity1 SINGLE COMPONENT
DC Resistance Rating in Ohms89.000 SINGLE COMPONENT SINGLE WINDING
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Winding Operating Current125.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE WINDING
Terminal Type and Quantity2 STANDOFF INSULATOR
Body Height1.750 INCHES NOMINAL IN
Body Width1.500 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
4820-00-087-6367 INTERCHANGEABLE
Disk,valve
4720-00-402-5141 INTERCHANGEABLE
Hose,nonmetallic
4720-00-430-3264 INTERCHANGEABLE
Hose Assembly,nonmetallic
5905-00-434-297589XR500 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Bi Technologies Corporation Div Bi Technologies Corp.
6140-00-538-8024 INTERCHANGEABLE
Battery,storage
5840-00-699-30952781 INTERCHANGEABLE
Desiccant Set
Naval Inventory Control Point Mechanicsburg
6625-00-735-25732781 INTERCHANGEABLE
Resistor,decade
Honeywell Inc Process Control Div
5315-00-882-0796570134 INTERCHANGEABLE
Pin,hollow
Honeywell International Inc. Div Aerospace - Torrance
5905-01-162-91462781 INTERCHANGEABLE
Resistor,fixed,wire Wound,induct
Ohmite Holding, L.l.c. Dba Ohmite Manufacturing
4540-01-191-49652781 INTERCHANGEABLE
Heater,range Focus
Cox & Company, Inc. Dba Cox & Co Inc
Cross-Reference Index
Part NumberManufacturer
2781 Transformer Technicians Inc (USA)
570134 Herley Chicago Dba Stewart Warner Electronics (USA)
Related Parts
4820-00-087-6367INTERCHANGEABLE
DISK,VALVE
4720-00-402-5141INTERCHANGEABLE
HOSE,NONMETALLIC
4720-00-430-3264INTERCHANGEABLE
HOSE ASSEMBLY,NONMETALLIC
5905-00-434-2975INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
89XR500
6140-00-538-8024INTERCHANGEABLE
BATTERY,STORAGE
5840-00-699-3095INTERCHANGEABLE
DESICCANT SET
2781
6625-00-735-2573INTERCHANGEABLE
RESISTOR,DECADE
2781
5315-00-882-0796INTERCHANGEABLE
PIN,HOLLOW
570134
5905-01-162-9146INTERCHANGEABLE
RESISTOR,FIXED,WIRE WOUND,INDUCT
2781
4540-01-191-4965INTERCHANGEABLE
HEATER,RANGE FOCUS
2781
6515-01-239-6982INTERCHANGEABLE
CUFF,SPHYGMOMANOMETER
2781
5845-01-352-7048INTERCHANGEABLE
INDICATOR,BEARING
57013-4

Frequently Asked Questions

What is NSN 5950-00-646-2629?

NSN 5950-00-646-2629 is a Reactor, manufactured by Transformer Technicians Inc, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-646-2629?

NSN 5950-00-646-2629 has 2 cross-referenced part numbers: 2781 (Transformer Technicians Inc), 570134 (Herley Chicago Dba Stewart Warner Electronics).

What NSN replaces 5950-00-646-2629?

There are 12 known substitutes for 5950-00-646-2629: 4820-00-087-6367, 4720-00-402-5141, 4720-00-430-3264 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 2781?

Key specifications for 2781: Frequency Rating: 800.0 HERTZ NOMINAL SINGLE COMPONENT; Reliability Indicator: NOT ESTABLISHED; Nominal Thread Size: 0.138 INCHES SINGLE GROUP IN; Inductance Type: FIXED. 20 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com