PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

RA20A2SD103AKResistor,variable,wire Wound,non

Joint Army-Navy Specifications Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M · NSN 5905-00-158-5731 · FSC 5905 · No Item Name Available
Verified by PartsTable
NSN 5905-00-158-5731 — this item is cataloged by the U.S. Government under National Stock Number 5905-00-158-5731. Primary manufacturer part number: RA20A2SD103AK.
Features
  • Resistor,variable,wire Wound,non — FSC 5905
  • Electrical Resistance Per Section: 10.000 KILOHMS SINGLE SECTION
  • Shaft Style: ROUND, SLOTTED
  • Power Dissipation Rating Per Section in Watts: 2.0 FREE AIR SINGLE SECTION
  • Mounting Method: STANDARD BUSHING
  • Screw Thread Diameter: 0.375 INCHES NOMINAL IN
  • Shaft Diameter: 0.250 INCHES NOMINAL IN
  • Screw Thread Series Designator: UNEF
Applications
  • Electrical power distribution
  • Signal transmission
  • Equipment interconnection
  • Circuit regulation and filtering
  • Signal conditioning
General Description

The Resistor,variable,wire Wound,non, cataloged under National Stock Number 5905-00-158-5731, is classified within Federal Supply Class 5905 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Joint Army-Navy Specifications Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 2 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5905-00-158-5731
Primary Part NumberRA20A2SD103AK
Item NameResistor,variable,wire Wound,non
FSC / FSG5905 / 59 — No Item Name Available
ManufacturerJoint Army-Navy Specifications Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Electrical Resistance Per Section10.000 KILOHMS SINGLE SECTION
Shaft StyleROUND, SLOTTED
Power Dissipation Rating Per Section in Watts2.0 FREE AIR SINGLE SECTION
Mounting MethodSTANDARD BUSHING
Screw Thread Diameter0.375 INCHES NOMINAL IN
Shaft Diameter0.250 INCHES NOMINAL IN
Screw Thread Series DesignatorUNEF
Body Diameter1.280 INCHES NOMINAL IN
Terminal Type and Quantity3 TAB, SOLDER LUG
Test Data Document81349-MIL-R-19 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.).
Actuator TypeSINGLE SHAFT
Mounting Bushing Length0.375 INCHES NOMINAL IN
Shaft Length0.875 INCHES NOMINAL IN
Screw Thread Quantity Per Inch32.0
Nonturn Device Radius0.531 INCHES NOMINAL IN
Body StyleCYLINDRICAL BUSHING MOUNTED
Body Length0.625 INCHES NOMINAL IN
Nonturn Device LocationAT 9 OCLOCK
Section Quantity1
Resistance Tolerance Per Section in Percent-10.0 TO 10.0 SINGLE SECTION
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 2
5905-00-617-8016 INTERCHANGEABLE
Resistor,variable,wire Wound,non
5950-00-981-5398T2026 INTERCHANGEABLE
Transformer,radio Frequency
Te Connectivity Corporation Div Corcom
Cross-Reference Index
Part NumberManufacturer
RA20A2SD103AK Joint Army-Navy Specifications Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
H8979 Cts Corp Electromechanical Div (USA)
JANR19 Joint Army-Navy Specifications Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
H8979 Cts Corp (USA)
P3R57P180 Lockheed Martin Corp Naval Electronics & Surveillance Systems (USA)
Related Parts
5905-00-617-8016INTERCHANGEABLE
RESISTOR,VARIABLE,WIRE WOUND,NON
5950-00-981-5398INTERCHANGEABLE
TRANSFORMER,RADIO FREQUENCY
T2026

Frequently Asked Questions

What is NSN 5905-00-158-5731?

NSN 5905-00-158-5731 is a Resistor,variable,wire Wound,non, manufactured by Joint Army-Navy Specifications Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5905 (No Item Name Available). Status: active.

What are the part numbers for NSN 5905-00-158-5731?

NSN 5905-00-158-5731 has 5 cross-referenced part numbers: RA20A2SD103AK (Joint Army-Navy Specifications Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), H8979 (Cts Corp Electromechanical Div), JANR19 (Joint Army-Navy Specifications Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), H8979 (Cts Corp), P3R57P180 (Lockheed Martin Corp Naval Electronics & Surveillance Systems).

What NSN replaces 5905-00-158-5731?

There are 2 known substitutes for 5905-00-158-5731: 5905-00-617-8016, 5950-00-981-5398. Verify interchangeability with system specifications before substitution.

What are the specifications of RA20A2SD103AK?

Key specifications for RA20A2SD103AK: Electrical Resistance Per Section: 10.000 KILOHMS SINGLE SECTION; Shaft Style: ROUND, SLOTTED; Power Dissipation Rating Per Section in Watts: 2.0 FREE AIR SINGLE SECTION; Mounting Method: STANDARD BUSHING. 20 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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