PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MILS20708Synchro,differential Transmitter

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5990-00-644-0101 · FSC 5990 · No Item Name Available
Verified by PartsTable
NSN 5990-00-644-0101 — this item is cataloged by the U.S. Government under National Stock Number 5990-00-644-0101. Primary manufacturer part number: MILS20708.
Features
  • Synchro,differential Transmitter — FSC 5990
  • Torque Gradient Per Angular Deg: 0.090 INCH-OUNCES NOMINAL IN
  • Shaft Diameter: 0.2405 INCHES NOMINAL SINGLE SHAFT IN
  • Spline Tooth Diametral Pitch: 96 SINGLE SHAFT
  • Transformation Ratio: 1.154 ROTOR TO STATOR NOMINAL
  • Frequency in Hertz: 400.0 NOMINAL
  • Spline Tooth Quantity: 22 SINGLE SHAFT
  • Shaft Length: 0.7190 INCHES NOMINAL SINGLE SHAFT IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Synchro,differential Transmitter, cataloged under National Stock Number 5990-00-644-0101, 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 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5990-00-644-0101
Primary Part NumberMILS20708
Item NameSynchro,differential Transmitter
FSC / FSG5990 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusACTIVE
Torque Gradient Per Angular Deg0.090 INCH-OUNCES NOMINAL IN
Shaft Diameter0.2405 INCHES NOMINAL SINGLE SHAFT IN
Spline Tooth Diametral Pitch96 SINGLE SHAFT
Transformation Ratio1.154 ROTOR TO STATOR NOMINAL
Frequency in Hertz400.0 NOMINAL
Spline Tooth Quantity22 SINGLE SHAFT
Shaft Length0.7190 INCHES NOMINAL SINGLE SHAFT IN
Stator Input Voltage Rating in Volts115.0 NOMINAL
Shaft Thread Class3A SINGLE SHAFT A
Shaft Nominal Thread Size0.250 INCHES SINGLE SHAFT IN
Shaft TypeSPLINE W/THREADS SINGLE SHAFT
Body Size23
Nondefinitive Spec/std Data23TDX4 TYPE
Stator Input Electrical Power Rating9.2 WATTS NOMINAL
Terminal Type and Quantity7 SCREW
Shaft Thread Length0.2670 INCHES NOMINAL SINGLE SHAFT IN
Shaft Thread DirectionRIGHT-HAND SINGLE SHAFT
Stator Input Current Rating1.210 AMPERES NOMINAL
Shaft Thread Series DesignatorUNF SINGLE SHAFT
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 12
5990-00-018-9723M20708/20-01C INTERCHANGEABLE
Synchro,transmitter
Sae International Dba Sae International
5990-00-503-4126 INTERCHANGEABLE
Synchro,transmitter
5990-00-552-9365 INTERCHANGEABLE
Synchro,receiver
5990-00-553-67118212778 INTERCHANGEABLE
Synchro,transmitter
Sae International Dba Sae International
5990-00-636-41117674819 INTERCHANGEABLE
Synchro,receiver
Sae International Dba Sae International
5990-00-636-41197676906 INTERCHANGEABLE
Synchro,transmitter
Sae International Dba Sae International
5990-00-644-00968212797 INTERCHANGEABLE
Synchro,differential Transmitter
Sae International Dba Sae International
5990-00-644-01028212786 INTERCHANGEABLE
Synchro,differential Transmitter
Sae International Dba Sae International
5990-00-644-01207674821 INTERCHANGEABLE
Synchro,control Transformer
Sae International Dba Sae International
5990-00-644-01238212775 INTERCHANGEABLE
Synchro,control Transformer
Sae International Dba Sae International
Cross-Reference Index
Part NumberManufacturer
MILS20708 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MILS20708-94 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
Related Parts
5990-00-018-9723INTERCHANGEABLE
SYNCHRO,TRANSMITTER
M20708/20-01C
5990-00-503-4126INTERCHANGEABLE
SYNCHRO,TRANSMITTER
5990-00-552-9365INTERCHANGEABLE
SYNCHRO,RECEIVER
5990-00-553-6711INTERCHANGEABLE
SYNCHRO,TRANSMITTER
8212778
5990-00-636-4111INTERCHANGEABLE
SYNCHRO,RECEIVER
7674819
5990-00-636-4119INTERCHANGEABLE
SYNCHRO,TRANSMITTER
7676906
5990-00-644-0096INTERCHANGEABLE
SYNCHRO,DIFFERENTIAL TRANSMITTER
8212797
5990-00-644-0102INTERCHANGEABLE
SYNCHRO,DIFFERENTIAL TRANSMITTER
8212786
5990-00-644-0120INTERCHANGEABLE
SYNCHRO,CONTROL TRANSFORMER
7674821
5990-00-644-0123INTERCHANGEABLE
SYNCHRO,CONTROL TRANSFORMER
8212775
5990-00-677-6476INTERCHANGEABLE
SYNCHRO,CONTROL TRANSFORMER
M20708/25-01B
5990-00-756-2555INTERCHANGEABLE
SYNCHRO,TRANSMITTER

Frequently Asked Questions

What is NSN 5990-00-644-0101?

NSN 5990-00-644-0101 is a Synchro,differential Transmitter, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 5990 (No Item Name Available). Status: active.

What are the part numbers for NSN 5990-00-644-0101?

NSN 5990-00-644-0101 has 2 cross-referenced part numbers: MILS20708 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MILS20708-94 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M).

What NSN replaces 5990-00-644-0101?

There are 12 known substitutes for 5990-00-644-0101: 5990-00-018-9723, 5990-00-503-4126, 5990-00-552-9365 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MILS20708?

Key specifications for MILS20708: Torque Gradient Per Angular Deg: 0.090 INCH-OUNCES NOMINAL IN; Shaft Diameter: 0.2405 INCHES NOMINAL SINGLE SHAFT IN; Spline Tooth Diametral Pitch: 96 SINGLE SHAFT; Transformation Ratio: 1.154 ROTOR TO STATOR NOMINAL. 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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