PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

18TR6ASynchro,receiver

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 5990-00-552-9365 · FSC 5990 · No Item Name Available
Verified by PartsTable
NSN 5990-00-552-9365 — this item is cataloged by the U.S. Government under National Stock Number 5990-00-552-9365. Primary manufacturer part number: 18TR6A.
Features
  • Synchro,receiver — FSC 5990
  • Shaft Type: SPLINE SINGLE SHAFT
  • Shaft Diameter: 0.1870 INCHES MINIMUM AND 0.1872 INCHES MAXIMUM SINGLE SHAFT IN
  • Spline Tooth Diametral Pitch: 120 SINGLE SHAFT
  • Spline Tooth Quantity: 21 SINGLE SHAFT
  • Body Size: 18
  • Frequency in Hertz: 60.0 NOMINAL
  • Shaft Length: 0.4870 INCHES MINIMUM AND 0.5130 INCHES MAXIMUM SINGLE SHAFT IN
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Synchro,receiver, cataloged under National Stock Number 5990-00-552-9365, 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 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5990-00-552-9365
Primary Part Number18TR6A
Item NameSynchro,receiver
FSC / FSG5990 / 59 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Shaft TypeSPLINE SINGLE SHAFT
Shaft Diameter0.1870 INCHES MINIMUM AND 0.1872 INCHES MAXIMUM SINGLE SHAFT IN
Spline Tooth Diametral Pitch120 SINGLE SHAFT
Spline Tooth Quantity21 SINGLE SHAFT
Body Size18
Frequency in Hertz60.0 NOMINAL
Shaft Length0.4870 INCHES MINIMUM AND 0.5130 INCHES MAXIMUM SINGLE SHAFT IN
Terminal Type and Quantity5 SCREW
Rotor Input Electrical Power Rating4.0 WATTS NOMINAL
Torque Gradient Per Angular Deg0.025 INCH-OUNCES NOMINAL IN
Rotor Input Current Rating105.0 MILLIAMPERES NOMINAL
Transformation Ratio0.780 ROTOR TO STATOR NOMINAL
Rotor Input Voltage Rating in Volts115.0 NOMINAL
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
5990-00-018-9723M20708/20-01C INTERCHANGEABLE
Synchro,transmitter
Sae International Dba Sae International
5990-00-064-457018TR6A INTERCHANGEABLE
Synchro,receiver
Honeywell International Inc. Dba Honeywell International
5990-00-503-4126 INTERCHANGEABLE
Synchro,transmitter
5990-00-644-0101 INTERCHANGEABLE
Synchro,differential Transmitter
5990-00-677-6476M20708/25-01B INTERCHANGEABLE
Synchro,control Transformer
Sae International Dba Sae International
5990-00-851-2793 INTERCHANGEABLE
Synchro,differential Transmitter
5990-00-866-3692 INTERCHANGEABLE
Synchro,differential Transmitter
5990-00-899-0517 INTERCHANGEABLE
Synchro,control Transformer
5990-00-912-8849 INTERCHANGEABLE
Synchro,transmitter
5990-01-121-1175M20708/67-01B INTERCHANGEABLE
Synchro,differential Receiver
Sae International Dba Sae International
Cross-Reference Index
Part NumberManufacturer
18TR6A Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
108C1C Northrop Grumman Systems Corporation (USA)
MILS20708 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
108C1C Kontron Europe Gmbh (DEU)
Related Parts
5990-00-018-9723INTERCHANGEABLE
SYNCHRO,TRANSMITTER
M20708/20-01C
5990-00-064-4570INTERCHANGEABLE
SYNCHRO,RECEIVER
18TR6A
5990-00-503-4126INTERCHANGEABLE
SYNCHRO,TRANSMITTER
5990-00-644-0101INTERCHANGEABLE
SYNCHRO,DIFFERENTIAL TRANSMITTER
5990-00-677-6476INTERCHANGEABLE
SYNCHRO,CONTROL TRANSFORMER
M20708/25-01B
5990-00-851-2793INTERCHANGEABLE
SYNCHRO,DIFFERENTIAL TRANSMITTER
5990-00-866-3692INTERCHANGEABLE
SYNCHRO,DIFFERENTIAL TRANSMITTER
5990-00-899-0517INTERCHANGEABLE
SYNCHRO,CONTROL TRANSFORMER
5990-00-912-8849INTERCHANGEABLE
SYNCHRO,TRANSMITTER
5990-01-121-1175INTERCHANGEABLE
SYNCHRO,DIFFERENTIAL RECEIVER
M20708/67-01B

Frequently Asked Questions

What is NSN 5990-00-552-9365?

NSN 5990-00-552-9365 is a Synchro,receiver, 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: cancelled.

What are the part numbers for NSN 5990-00-552-9365?

NSN 5990-00-552-9365 has 4 cross-referenced part numbers: 18TR6A (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 108C1C (Northrop Grumman Systems Corporation), MILS20708 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), 108C1C (Kontron Europe Gmbh).

What NSN replaces 5990-00-552-9365?

There are 10 known substitutes for 5990-00-552-9365: 5990-00-018-9723, 5990-00-064-4570, 5990-00-503-4126 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 18TR6A?

Key specifications for 18TR6A: Shaft Type: SPLINE SINGLE SHAFT; Shaft Diameter: 0.1870 INCHES MINIMUM AND 0.1872 INCHES MAXIMUM SINGLE SHAFT IN; Spline Tooth Diametral Pitch: 120 SINGLE SHAFT; Spline Tooth Quantity: 21 SINGLE SHAFT. 14 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5990-00-552-9365 still in active supply?

NSN 5990-00-552-9365 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com