PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

VCDX8-4J5LSynchro,differential Transmitter

General Dynamics Motion Control Llc · NSN 5990-00-850-6603 · FSC 5990 · No Item Name Available
Verified by PartsTable
NSN 5990-00-850-6603 — this item is cataloged by the U.S. Government under National Stock Number 5990-00-850-6603. Primary manufacturer part number: VCDX8-4J5L.
Features
  • Synchro,differential Transmitter — FSC 5990
  • Flange Thickness: 0.0620 INCHES NOMINAL IN
  • Pilot Diameter: 0.5000 INCHES NOMINAL IN
  • Undercut Diameter: 0.6920 INCHES NOMINAL IN
  • Flange Diameter: 0.7500 INCHES NOMINAL IN
  • Body Style: STANDARD ROUND A
  • Shaft Length: 0.4180 INCHES NOMINAL SINGLE SHAFT IN
  • Stator Input Current Rating: 146.0 MILLIAMPERES NOMINAL
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Synchro,differential Transmitter, cataloged under National Stock Number 5990-00-850-6603, is classified within Federal Supply Class 5990 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is General Dynamics Motion Control Llc. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5990-00-850-6603
Primary Part NumberVCDX8-4J5L
Item NameSynchro,differential Transmitter
FSC / FSG5990 / 59 — No Item Name Available
ManufacturerGeneral Dynamics Motion Control Llc
StatusACTIVE
Flange Thickness0.0620 INCHES NOMINAL IN
Pilot Diameter0.5000 INCHES NOMINAL IN
Undercut Diameter0.6920 INCHES NOMINAL IN
Flange Diameter0.7500 INCHES NOMINAL IN
Body StyleSTANDARD ROUND A
Shaft Length0.4180 INCHES NOMINAL SINGLE SHAFT IN
Stator Input Current Rating146.0 MILLIAMPERES NOMINAL
Undercut Width0.0620 INCHES NOMINAL IN
Body MaterialSTEEL CORROSION RESISTING
Phase Shift Angle in Deg12.000 INPUT TO OUTPUT NOMINAL
Fragility FactorMODERATELY RUGGED
Actuator Friction Torque at Plus 25 Deg Celsius1.3 CENTIMETER-GRAMS NOMINAL CM
Terminal Type and Quantity5 WIRE LEAD
Terminal LocationREAR
Shaft Diameter0.1200 INCHES NOMINAL SINGLE SHAFT IN
Body Size8
Mounting Surface to Terminal End Distance1.2400 INCHES MAXIMUM IN
Plus J Zrs Reactance in Ohms12.00 NOMINAL
Electrical Error Angular Range in Minutes-7.0 TO 7.0
Zrs Resistance in Ohms60.00 NOMINAL
Stator Input Voltage Rating in Volts26.0 NOMINAL
Shaft Slot Width0.0250 INCHES NOMINAL SINGLE SHAFT IN
Shaft TypeROUND, SLOTTED SINGLE SHAFT
Shaft Slot Depth0.0300 INCHES NOMINAL SINGLE SHAFT IN
Stator Input Electrical Power Rating500.0 MILLIWATTS NOMINAL
Pilot Length0.0400 INCHES NOMINAL IN
Maximum Total Null Voltage Output in Millivolts Per Volt25.00
Frequency in Hertz400.0 NOMINAL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
6685-00-480-6538210431 INTERCHANGEABLE
Needle,valve
Ideal Aerosmith Inc
1660-00-677-996721043-1 INTERCHANGEABLE
Converter,liquid Oxygen
Ingersoll-Rand Company Dba Ingersoll-Rand
9330-01-267-0637 INTERCHANGEABLE
Plastic Sheet,laminated,decorati
Cross-Reference Index
Part NumberManufacturer
VCDX8-4J5L PRIMARY General Dynamics Motion Control Llc (USA)
VCDX8-4J5L Vernitron Corp (USA)
2104-3-1 Tempo Instrument Inc Defense Electronics Div (USA)
Related Parts
6685-00-480-6538INTERCHANGEABLE
NEEDLE,VALVE
210431
1660-00-677-9967INTERCHANGEABLE
CONVERTER,LIQUID OXYGEN
21043-1
9330-01-267-0637INTERCHANGEABLE
PLASTIC SHEET,LAMINATED,DECORATI

Frequently Asked Questions

What is NSN 5990-00-850-6603?

NSN 5990-00-850-6603 is a Synchro,differential Transmitter, manufactured by General Dynamics Motion Control Llc, classified under FSC 5990 (No Item Name Available). Status: active.

What are the part numbers for NSN 5990-00-850-6603?

NSN 5990-00-850-6603 has 3 cross-referenced part numbers: VCDX8-4J5L (General Dynamics Motion Control Llc), VCDX8-4J5L (Vernitron Corp), 2104-3-1 (Tempo Instrument Inc Defense Electronics Div).

What NSN replaces 5990-00-850-6603?

There are 3 known substitutes for 5990-00-850-6603: 6685-00-480-6538, 1660-00-677-9967, 9330-01-267-0637. Verify interchangeability with system specifications before substitution.

What are the specifications of VCDX8-4J5L?

Key specifications for VCDX8-4J5L: Flange Thickness: 0.0620 INCHES NOMINAL IN; Pilot Diameter: 0.5000 INCHES NOMINAL IN; Overall Length: 1.7310 INCHES MAXIMUM IN; Undercut Diameter: 0.6920 INCHES NOMINAL IN. 29 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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