PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

51038FHydrophone,sonar

Naval Ship Systems Command · NSN 5845-00-642-6621 · FSC 5845 · No Item Name Available
Verified by PartsTable
NSN 5845-00-642-6621 — this item is cataloged by the U.S. Government under National Stock Number 5845-00-642-6621. Primary manufacturer part number: 51038F.
Features
  • Hydrophone,sonar — FSC 5845
  • Signal Cable Controlling Agency: BRUSH DEVELOPMENT CO
  • Frequency Rating: 1.0 KILOHERTZ MINIMUM AND 20.0 KILOHERTZ MAXIMUM
  • Impedance Rating in Ohms: 25.0 NOMINAL
  • Unit Type: ROCHELLE SALT
  • Frequency at Which Impedance Rating Applies: 20.0 KILOHERTZ
  • Overall Diameter: 2.500 INCHES NOMINAL IN
  • Filler Material: CASTOR OIL
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Hydrophone,sonar, cataloged under National Stock Number 5845-00-642-6621, is classified within Federal Supply Class 5845 (No Item Name Available) of the Communication, Detection, and Coherent Radiation Equipment group. The primary manufacturer of record is Naval Ship Systems Command. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5845-00-642-6621
Primary Part Number51038F
Item NameHydrophone,sonar
FSC / FSG5845 / 58 — No Item Name Available
ManufacturerNaval Ship Systems Command
StatusACTIVE
Signal Cable Controlling AgencyBRUSH DEVELOPMENT CO
Frequency Rating1.0 KILOHERTZ MINIMUM AND 20.0 KILOHERTZ MAXIMUM
Impedance Rating in Ohms25.0 NOMINAL
Unit TypeROCHELLE SALT
Frequency at Which Impedance Rating Applies20.0 KILOHERTZ
Overall Diameter2.500 INCHES NOMINAL IN
Filler MaterialCASTOR OIL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 8
5306-00-151-1411AN4-25A INTERCHANGEABLE
Bolt,machine
National Aerospace Standards Committee Aerospace Industries Association of America Inc Not for Rfq or Solicitation Use
2520-00-213-0970 INTERCHANGEABLE
Disk,clutch,vehicular
3110-00-227-4832 INTERCHANGEABLE
Ring,bearing,outer
3810-00-374-0166 INTERCHANGEABLE
Housing,pendant Pul
6615-00-488-6996C376 INTERCHANGEABLE
Parts Kit,servo VA
Moog Military Aircraft Llc
5950-01-092-3918 INTERCHANGEABLE
Coil,radio Frequency
5365-01-197-5184C37-6 INTERCHANGEABLE
Spring
Hme, Inc. Dba Hme Ahrens-Fox
6105-01-416-2323400018 INTERCHANGEABLE
Motor,rotator,labor
Helmer Scientific Llc Dba Helmer
Cross-Reference Index
Part NumberManufacturer
C37-6 Gould Instrument Systems Inc (USA)
400018 Gould Instrument Systems Inc (USA)
51038F PRIMARY Naval Ship Systems Command (USA)
Related Parts
5306-00-151-1411INTERCHANGEABLE
BOLT,MACHINE
AN4-25A
2520-00-213-0970INTERCHANGEABLE
DISK,CLUTCH,VEHICULAR
3110-00-227-4832INTERCHANGEABLE
RING,BEARING,OUTER
3810-00-374-0166INTERCHANGEABLE
HOUSING,PENDANT PUL
6615-00-488-6996INTERCHANGEABLE
PARTS KIT,SERVO VA
C376
5950-01-092-3918INTERCHANGEABLE
COIL,RADIO FREQUENCY
5365-01-197-5184INTERCHANGEABLE
SPRING
C37-6
6105-01-416-2323INTERCHANGEABLE
MOTOR,ROTATOR,LABOR
400018

Frequently Asked Questions

What is NSN 5845-00-642-6621?

NSN 5845-00-642-6621 is a Hydrophone,sonar, manufactured by Naval Ship Systems Command, classified under FSC 5845 (No Item Name Available). Status: active.

What are the part numbers for NSN 5845-00-642-6621?

NSN 5845-00-642-6621 has 3 cross-referenced part numbers: C37-6 (Gould Instrument Systems Inc), 400018 (Gould Instrument Systems Inc), 51038F (Naval Ship Systems Command).

What NSN replaces 5845-00-642-6621?

There are 8 known substitutes for 5845-00-642-6621: 5306-00-151-1411, 2520-00-213-0970, 3110-00-227-4832 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 51038F?

Key specifications for 51038F: Signal Cable Controlling Agency: BRUSH DEVELOPMENT CO; Frequency Rating: 1.0 KILOHERTZ MINIMUM AND 20.0 KILOHERTZ MAXIMUM; End Item Identification: MODEL JR; Impedance Rating in Ohms: 25.0 NOMINAL. 9 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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