PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

A109Transformer,audio Frequency

B G Laboratories Inc. · NSN 5950-00-443-8551 · FSC 5950 · No Item Name Available
Verified by PartsTable
NSN 5950-00-443-8551 — this item is cataloged by the U.S. Government under National Stock Number 5950-00-443-8551. Primary manufacturer part number: A109.
Features
  • Transformer,audio Frequency — FSC 5950
  • Center to Center Distance Between Mounting Facilities Parallel to Length: 1.875 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
  • Body Height: 2.500 INCHES NOMINAL IN
  • Inclosure Type: FULLY INCLOSED
  • Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
  • Frequency Rating: 400.0 HERTZ NOMINAL SINGLE COMPONENT
  • Thread Quantity Per Inch: 32 SINGLE GROUP
  • Center to Center Distance Between Mounting Facilities Parallel to Width: 1.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-443-8551, 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 B G Laboratories Inc.. Government technical data includes 13 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. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5950-00-443-8551
Primary Part NumberA109
Item NameTransformer,audio Frequency
FSC / FSG5950 / 59 — No Item Name Available
ManufacturerB G Laboratories Inc.
StatusACTIVE
Center to Center Distance Between Mounting Facilities Parallel to Length1.875 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Height2.500 INCHES NOMINAL IN
Inclosure TypeFULLY INCLOSED
Thread Series DesignatorUNIFIED NATIONAL COARSE (UNC) SINGLE GROUP
Frequency Rating400.0 HERTZ NOMINAL SINGLE COMPONENT
Thread Quantity Per Inch32 SINGLE GROUP
Center to Center Distance Between Mounting Facilities Parallel to Width1.000 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN
Body Length3.000 INCHES NOMINAL IN
Body Width1.624 INCHES NOMINAL IN
Nominal Thread Size0.138 INCHES SINGLE GROUP IN
Mounting MethodTHREADED HOLE(S) SINGLE GROUP
Terminal Type and Quantity1 CONNECTOR, RECEPTACLE
Mounting Facility Quantity4 SINGLE GROUP
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 9
6625-00-004-8790 INTERCHANGEABLE
Lead,test
1095-00-019-1620926689-1 INTERCHANGEABLE
Control Panel
Lockheed Martin Corp
5977-00-070-962810904 INTERCHANGEABLE
Brush,electrical Contact
Miraj Corp
6810-00-241-1159 INTERCHANGEABLE
Sodium Peroxide,anhydrous
5950-00-345-82647865 INTERCHANGEABLE
Reactor
Bell Industries Inc J W Miller Magnetics Div
6625-00-358-631921734 INTERCHANGEABLE
Ammeter
Mitsubishi Caterpillar Forklift America, Inc
5110-00-854-34147-865 INTERCHANGEABLE
Sharpener,cork Borer
Fisher Scientific Worldwide
5915-01-380-0019 INTERCHANGEABLE
Filter,radio Frequency Interfere
5930-01-442-93227865 INTERCHANGEABLE
Adapter,switch Actuator
Circor Aerospace, Inc. Dba Circor Aerospace Inc
Cross-Reference Index
Part NumberManufacturer
7865 Data Device Corp Dba Beta Transformer Technology (USA)
A109 PRIMARY B G Laboratories Inc. (USA)
Related Parts
6625-00-004-8790INTERCHANGEABLE
LEAD,TEST
1095-00-019-1620INTERCHANGEABLE
CONTROL PANEL
926689-1
5977-00-070-9628INTERCHANGEABLE
BRUSH,ELECTRICAL CONTACT
10904
6810-00-241-1159INTERCHANGEABLE
SODIUM PEROXIDE,ANHYDROUS
5950-00-345-8264INTERCHANGEABLE
REACTOR
7865
6625-00-358-6319INTERCHANGEABLE
AMMETER
21734
5110-00-854-3414INTERCHANGEABLE
SHARPENER,CORK BORER
7-865
5915-01-380-0019INTERCHANGEABLE
FILTER,RADIO FREQUENCY INTERFERE
5930-01-442-9322INTERCHANGEABLE
ADAPTER,SWITCH ACTUATOR
7865

Frequently Asked Questions

What is NSN 5950-00-443-8551?

NSN 5950-00-443-8551 is a Transformer,audio Frequency, manufactured by B G Laboratories Inc., classified under FSC 5950 (No Item Name Available). Status: active.

What are the part numbers for NSN 5950-00-443-8551?

NSN 5950-00-443-8551 has 2 cross-referenced part numbers: 7865 (Data Device Corp Dba Beta Transformer Technology), A109 (B G Laboratories Inc.).

What NSN replaces 5950-00-443-8551?

There are 9 known substitutes for 5950-00-443-8551: 6625-00-004-8790, 1095-00-019-1620, 5977-00-070-9628 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of A109?

Key specifications for A109: Center to Center Distance Between Mounting Facilities Parallel to Length: 1.875 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN; Body Height: 2.500 INCHES NOMINAL IN; Inclosure Type: FULLY INCLOSED; Thread Series Designator: UNIFIED NATIONAL COARSE (UNC) SINGLE GROUP. 13 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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