PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

S665Filter,radio Frequency Interfere

Dar Electronics Inc Dba National Radio Co · NSN 5915-00-643-8401 · FSC 5915 · No Item Name Available
Verified by PartsTable
NSN 5915-00-643-8401 — this item is cataloged by the U.S. Government under National Stock Number 5915-00-643-8401. Primary manufacturer part number: S665.
Features
  • Filter,radio Frequency Interfere — FSC 5915
  • Mounting Facility Screw Thread Series Designator: UNEF
  • Nominal Thread Size: 0.625 INCHES IN
  • Body Outside Diameter: 1.344 INCHES NOMINAL IN
  • Operating Voltage Rating and Type Per Function: 125.0 VOLTS AC BLANK LOCATION NOT OTHERWISE SPECIFIED
  • Load Impedance Per Function: 50.0 OHMS BLANK LOCATION NOT OTHERWISE SPECIFIED
  • Principal Circuitry Type Per Function: INDUCTANCE-CAPACITANCE BLANK LOCATION NOT OTHERWISE SPECIFIED
  • Body Material: METAL
Applications
  • Fluid filtration and purification
  • Engine intake air cleaning
  • Hydraulic system protection
General Description

The Filter,radio Frequency Interfere, cataloged under National Stock Number 5915-00-643-8401, is classified within Federal Supply Class 5915 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Dar Electronics Inc Dba National Radio Co. Government technical data includes 18 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. 7 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5915-00-643-8401
Primary Part NumberS665
Item NameFilter,radio Frequency Interfere
FSC / FSG5915 / 59 — No Item Name Available
ManufacturerDar Electronics Inc Dba National Radio Co
StatusACTIVE
Mounting Facility Screw Thread Series DesignatorUNEF
Nominal Thread Size0.625 INCHES IN
Body Outside Diameter1.344 INCHES NOMINAL IN
Operating Voltage Rating and Type Per Function125.0 VOLTS AC BLANK LOCATION NOT OTHERWISE SPECIFIED
Load Impedance Per Function50.0 OHMS BLANK LOCATION NOT OTHERWISE SPECIFIED
Principal Circuitry Type Per FunctionINDUCTANCE-CAPACITANCE BLANK LOCATION NOT OTHERWISE SPECIFIED
Body MaterialMETAL
Operating Current Rating Per Function in Amps10.0 BLANK LOCATION NOT OTHERWISE SPECIFIED
Source Impedance Rating Per Function50.0 OHMS BLANK LOCATION NOT OTHERWISE SPECIFIED
Maximum Voltage Drop Per Function1.3 VOLTS AC BLANK LOCATION NOT OTHERWISE SPECIFIED
Inclosure TypeHERMETICALLY SEALED
Functional Terminal Type and Quantity1 TAB, SOLDER LUG INPUT FIRST FUNCTION
Style DesignatorROUND TERMINAL/TERMINALS ON OPPOSITE SURFACES
Functional Terminal Type and Quantity1 TAB, SOLDER LUG OUTPUT SECOND FUNCTION
Mounting Facility Type and Quantity1 THREADED BUSHING LOCATION NOT OTHERWISE SPECIFIED
Operating Temp Range-55.0 TO 85.0 CELSIUS DEGC
Power Line Frequency Rating Per Function in Hertz400.0 BLANK LOCATION NOT OTHERWISE SPECIFIED
Body Length3.500 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 7
5310-00-226-5978 INTERCHANGEABLE
Washer,key
2805-00-517-991520012A INTERCHANGEABLE
Valve,poppet,engine
Brinkley Technology Group Llc Dba Hercules Manufacturing
2910-00-801-46790-14981 INTERCHANGEABLE
Carburetor,float
Zenith Fuel Systems Llc
6130-00-887-059470950031-006 INTERCHANGEABLE
Power Supply
Getronics Government Solutions Llc
5305-01-215-5183S-665 INTERCHANGEABLE
Setscrew
Meritor Industrial Products, Llc
1650-01-302-3028 INTERCHANGEABLE
Cap,accumulator
5975-01-425-1101 INTERCHANGEABLE
Mounting Base,electrical Equipme
Cross-Reference Index
Part NumberManufacturer
S665 Dar Electronics Inc Dba National Radio Co (USA)
S665 Dar Electronics Inc Commercial Products Div Dba National Radio Co (USA)
Related Parts
5310-00-226-5978INTERCHANGEABLE
WASHER,KEY
2805-00-517-9915INTERCHANGEABLE
VALVE,POPPET,ENGINE
20012A
2910-00-801-4679INTERCHANGEABLE
CARBURETOR,FLOAT
0-14981
6130-00-887-0594INTERCHANGEABLE
POWER SUPPLY
70950031-006
5305-01-215-5183INTERCHANGEABLE
SETSCREW
S-665
1650-01-302-3028INTERCHANGEABLE
CAP,ACCUMULATOR
5975-01-425-1101INTERCHANGEABLE
MOUNTING BASE,ELECTRICAL EQUIPME

Frequently Asked Questions

What is NSN 5915-00-643-8401?

NSN 5915-00-643-8401 is a Filter,radio Frequency Interfere, manufactured by Dar Electronics Inc Dba National Radio Co, classified under FSC 5915 (No Item Name Available). Status: active.

What are the part numbers for NSN 5915-00-643-8401?

NSN 5915-00-643-8401 has 2 cross-referenced part numbers: S665 (Dar Electronics Inc Dba National Radio Co), S665 (Dar Electronics Inc Commercial Products Div Dba National Radio Co).

What NSN replaces 5915-00-643-8401?

There are 7 known substitutes for 5915-00-643-8401: 5310-00-226-5978, 2805-00-517-9915, 2910-00-801-4679 and 4 more. Verify interchangeability with system specifications before substitution.

What are the specifications of S665?

Key specifications for S665: Mounting Facility Screw Thread Series Designator: UNEF; Nominal Thread Size: 0.625 INCHES IN; Body Outside Diameter: 1.344 INCHES NOMINAL IN; Operating Voltage Rating and Type Per Function: 125.0 VOLTS AC BLANK LOCATION NOT OTHERWISE SPECIFIED. 19 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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