PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

M138Microphone,dynamic

Bosch Security Systems, Inc Dba Use CAGE Code 25734 for Cataloging Div Communications Division · NSN 5965-00-937-1851 · FSC 5965 · No Item Name Available
Verified by PartsTable
NSN 5965-00-937-1851 — this item is cataloged by the U.S. Government under National Stock Number 5965-00-937-1851. Primary manufacturer part number: M138.
Features
  • Microphone,dynamic — FSC 5965
  • Material: PLASTIC CASE
  • Test Data Document: 81349-MIL-M-26542 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
  • Height: 0.706 INCHES NOMINAL IN
  • Functional Description: 150 OHM MICROPHONE WITH BOOM AND CORD ASSEMBLY FOR USE ON HEADSET-MICROPHONES AND HELMETS.
  • Cable Manufacturer Code: 81349
  • Impedance Rating: 150.0 OHMS NOMINAL
  • Cable Shielded Conductor Quantity: 2
Applications
  • Applications requiring Plastic Case construction
General Description

The Microphone,dynamic, cataloged under National Stock Number 5965-00-937-1851, is classified within Federal Supply Class 5965 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Bosch Security Systems, Inc Dba Use CAGE Code 25734 for Cataloging Div Communications Division. Government technical data includes 23 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 15 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5965-00-937-1851
Primary Part NumberM138
Item NameMicrophone,dynamic
FSC / FSG5965 / 59 — No Item Name Available
ManufacturerBosch Security Systems, Inc Dba Use CAGE Code 25734 for Cataloging Div Communications Division
StatusCANCELLED
MaterialPLASTIC CASE
Test Data Document81349-MIL-M-26542 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).
Height0.706 INCHES NOMINAL IN
Functional Description150 OHM MICROPHONE WITH BOOM AND CORD ASSEMBLY FOR USE ON HEADSET-MICROPHONES AND HELMETS.
Cable Manufacturer Code81349
Impedance Rating150.0 OHMS NOMINAL
Cable Shielded Conductor Quantity2
Sound Pickup Directional TypeUNIDIRECTIONAL
Cable Conductor Quantity2
Mounting MethodBRACKET(S)
Impedance Selection MethodPIN-JACK TYPE LEAD POSITIONING
Polarity ConnectionNOT REQUIRED
Output Sensitivity Rating Reference28 DYNES PER SQ CENTIMETER
Electrical Connection TypeINTEGRAL CORD
Accessory ComponentsCORD AND CONNECTOR
Frequency Response Range in Hertz+300.0 TO 3500.0
Cable IdentificationM22442/38-1
Extended Cable Length1.0 FEET NOMINAL FT
Connector IdentificationJJ-055
Connector Manufacturer Code81350
Body StyleHEADSET TYPE
Width1.250 INCHES NOMINAL IN
Length2.125 INCHES NOMINAL IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 7
3110-00-156-5298138R INTERCHANGEABLE
Bearing,ball,annular
Skf Usa Inc.
3110-00-198-2452 INTERCHANGEABLE
Ring,bearing,inner
6625-00-400-2475P6009 OPT 14 INTERCHANGEABLE
Probe-Lead Assembly,test
Tektronix, Inc.
6530-00-926-2151M-138 INTERCHANGEABLE
Sterilizer,surgical Instrument a
Environmental Tectonics Corp
3815-01-301-66009399138 INTERCHANGEABLE
Bucket,dragline
Rolls-Royce Solutions America Inc
6695-01-302-5903M138 INTERCHANGEABLE
Transducer,motional Pickup
Dynalco Controls Corporation
2040-01-633-754710622B INTERCHANGEABLE
Jackplate Control Panel
Gravois Aluminum Boats Llc Dba Metal Shark Boats Div Metal Shark
Cross-Reference Index
Part NumberManufacturer
M138 Bosch Security Systems, Inc Dba Use CAGE Code 25734 for Cataloging Div Communications Division (USA)
6000 WB Acousticom Corp Dba Acousticom (USA)
10525J Astrocom Electronics Inc (USA)
939-0616 Bosch Security Systems, Inc Dba Use CAGE Code 25734 for Cataloging Div Communications Division (USA)
M-138/G Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
939-9138 Bosch Security Systems, Inc Dba Use CAGE Code 25734 for Cataloging Div Communications Division (USA)
DM15-200OHM Scintrex Inc (USA)
M-138/G Joint Electronics Type Designation System (USA)
MIL-M-26542/10 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
10525D Astrocom Electronics Inc (USA)
MIL-PRF-26542/10 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
10525P Astrocom Electronics Inc (USA)
217-380-002-604 Roanwell, Llc (USA)
MIL-H-55535 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
10622B Astrocom Electronics Inc (USA)
Related Parts
3110-00-156-5298INTERCHANGEABLE
BEARING,BALL,ANNULAR
138R
3110-00-198-2452INTERCHANGEABLE
RING,BEARING,INNER
6625-00-400-2475INTERCHANGEABLE
PROBE-LEAD ASSEMBLY,TEST
P6009 OPT 14
6530-00-926-2151INTERCHANGEABLE
STERILIZER,SURGICAL INSTRUMENT A
M-138
3815-01-301-6600INTERCHANGEABLE
BUCKET,DRAGLINE
9399138
6695-01-302-5903INTERCHANGEABLE
TRANSDUCER,MOTIONAL PICKUP
M138
2040-01-633-7547INTERCHANGEABLE
JACKPLATE CONTROL PANEL
10622B

Frequently Asked Questions

What is NSN 5965-00-937-1851?

NSN 5965-00-937-1851 is a Microphone,dynamic, manufactured by Bosch Security Systems, Inc Dba Use CAGE Code 25734 for Cataloging Div Communications Division, classified under FSC 5965 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5965-00-937-1851?

NSN 5965-00-937-1851 has 15 cross-referenced part numbers: M138 (Bosch Security Systems, Inc Dba Use CAGE Code 25734 for Cataloging Div Communications Division), 6000 WB (Acousticom Corp Dba Acousticom), 10525J (Astrocom Electronics Inc), 939-0616 (Bosch Security Systems, Inc Dba Use CAGE Code 25734 for Cataloging Div Communications Division), M-138/G (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 10 more.

What NSN replaces 5965-00-937-1851?

There are 7 known substitutes for 5965-00-937-1851: 3110-00-156-5298, 3110-00-198-2452, 6625-00-400-2475 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of M138?

Key specifications for M138: Material: PLASTIC CASE; Test Data Document: 81349-MIL-M-26542 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.).; Height: 0.706 INCHES NOMINAL IN; Functional Description: 150 OHM MICROPHONE WITH BOOM AND CORD ASSEMBLY FOR USE ON HEADSET-MICROPHONES AND HELMETS.. 24 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5965-00-937-1851 still in active supply?

NSN 5965-00-937-1851 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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