PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51009-001Transformer,audio Frequency

Western Service Group Northrop Corp Precision Products Div · NSN 5950-01-239-3973 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-01-239-3973 — this item is cataloged by the U.S. Government under National Stock Number 5950-01-239-3973. Primary manufacturer part number: 51009-001.
Features
  • Transformer,audio Frequency — FSC 5950
  • 8 verified cross-references
  • Primary manufacturer: Western Service Group Northrop Corp Precision Products Div
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,audio Frequency, cataloged under National Stock Number 5950-01-239-3973, 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 Western Service Group Northrop Corp Precision Products Div. This item has 8 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Catalog Facts
Item NameTransformer,audio Frequency
FSC / FSG5950 — No Item Name Available (FSG 59)
ManufacturersWestern Service Group Northrop Corp Precision Products Div (CAGE 51834); Opt Industries Inc Div of Electronika Inc (CAGE 53342); Magnetika Inc Div Magnetika/phillipsburg Location (CAGE 1L8V1); Northrop Grumman Corp Precision Products Plant (CAGE 88932); United Transformer Corp Sub of Opt Industries Inc (CAGE 80223)
Technical Specifications
ParameterValue
NSN5950-01-239-3973
Primary Part Number51009-001
Item NameTransformer,audio Frequency
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerWestern Service Group Northrop Corp Precision Products Div
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5935-00-114-1508 INTERCHANGEABLE
Connector,receptacle,electrical
5110-00-148-9810 INTERCHANGEABLE
Stripper,wire,hand
5805-00-254-7759BX60 INTERCHANGEABLE
Generator,ringing,static
Reliance Comm/tec Corp Lorain Products Div
3820-00-371-679929004 INTERCHANGEABLE
Auger,earth
Terex Reedrill Dba Reedrill Texoma Div Terex Mining
5990-00-600-1844 INTERCHANGEABLE
Gear Assembly,spur
5315-00-946-8331 INTERCHANGEABLE
Pin,straight,headless
5340-01-195-749411047 INTERCHANGEABLE
Plunger,detent
Stanadyne Corporation Dba Stanadyne Diesel Systems Div Diesel Systems
5310-01-204-006011047 INTERCHANGEABLE
Nut,plain,hexagon
Parker-Hannifin Corporation Dba Racor Division Div Racor Division
6660-01-278-796511047 INTERCHANGEABLE
Wind Measuring Set
Vaisala Inc.
6685-01-492-766020W1001TH02BXUC30 AND VAC INTERCHANGEABLE
Gage,compound Pressure-Vacuum,di
Ashcroft Inc Dba Heise
Cross-Reference Index
Part NumberManufacturer
51009-001 Western Service Group Northrop Corp Precision Products Div (USA)
BSB-263 Opt Industries Inc Div of Electronika Inc (USA)
BSB-263 Magnetika Inc Div Magnetika/phillipsburg Location (USA)
51009-001 Northrop Grumman Corp Precision Products Plant (USA)
BSB-263 United Transformer Corp Sub of Opt Industries Inc (USA)
NH51009-001 Dla Land and Maritime Dba Engineering and Technical Support Div Document Standardization Division (vendor Item Drawings) (USA)
11047 Pico Electronics Inc (USA)
PICO-945 Pico Electronics Inc (USA)
Related Parts
5935-00-114-1508INTERCHANGEABLE
CONNECTOR,RECEPTACLE,ELECTRICAL
5110-00-148-9810INTERCHANGEABLE
STRIPPER,WIRE,HAND
5805-00-254-7759INTERCHANGEABLE
GENERATOR,RINGING,STATIC
BX60
3820-00-371-6799INTERCHANGEABLE
AUGER,EARTH
29004
5990-00-600-1844INTERCHANGEABLE
GEAR ASSEMBLY,SPUR
5315-00-946-8331INTERCHANGEABLE
PIN,STRAIGHT,HEADLESS
5340-01-195-7494INTERCHANGEABLE
PLUNGER,DETENT
11047
5310-01-204-0060INTERCHANGEABLE
NUT,PLAIN,HEXAGON
11047
6660-01-278-7965INTERCHANGEABLE
WIND MEASURING SET
11047
6685-01-492-7660INTERCHANGEABLE
GAGE,COMPOUND PRESSURE-VACUUM,DI
20W1001TH02BXUC30 AND VAC
5306-01-505-4657INTERCHANGEABLE
BOLT,MACHINE
11-047
4820-01-600-1988INTERCHANGEABLE
VALVE SOLENOID ASSE
11047

Frequently Asked Questions

What is NSN 5950-01-239-3973?

NSN 5950-01-239-3973 is a Transformer,audio Frequency, manufactured by Western Service Group Northrop Corp Precision Products Div, classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-01-239-3973?

NSN 5950-01-239-3973 has 8 cross-referenced part numbers: 51009-001 (Western Service Group Northrop Corp Precision Products Div), BSB-263 (Opt Industries Inc Div of Electronika Inc), BSB-263 (Magnetika Inc Div Magnetika/phillipsburg Location), 51009-001 (Northrop Grumman Corp Precision Products Plant), BSB-263 (United Transformer Corp Sub of Opt Industries Inc) and 3 more.

What NSN replaces 5950-01-239-3973?

There are 12 known substitutes for 5950-01-239-3973: 5935-00-114-1508, 5110-00-148-9810, 5805-00-254-7759 and 9 more. Verify interchangeability with system specifications before substitution.

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