The Synchro,control Transformer, cataloged under National Stock Number 5990-00-677-6476, 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 Sae International Dba Sae International. Government technical data includes 29 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5990-00-677-6476 |
| Primary Part Number | M20708/25-01B |
| Item Name | Synchro,control Transformer |
| FSC / FSG | 5990 / 59 — No Item Name Available |
| Manufacturer | Sae International Dba Sae International |
| Status | CANCELLED |
| Transformation Ratio | 0.735 ROTOR TO STATOR NOMINAL |
| Shaft Nominal Thread Size | 0.184 INCHES SINGLE SHAFT IN |
| Shaft Thread Direction | RIGHT-HAND SINGLE SHAFT |
| Shaft Thread Class | 2A SINGLE SHAFT A |
| Terminal Type and Quantity | 5 SCREW |
| Shaft Type | SPLINE W/THREADS SINGLE SHAFT |
| Terminal Location | REAR |
| Shaft Thread Series Designator | UNF SINGLE SHAFT |
| Body Size | 16 |
| Specification/standard Data | 81349-MIL-S-20708/25 GOVERNMENT SPECIFICATION |
| Mounting Surface to Terminal End Distance | 2.5775 INCHES MINIMUM AND 2.5780 INCHES MAXIMUM IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Stator Input Voltage Rating in Volts | 115.0 NOMINAL |
| Spline Tooth Diametral Pitch | 120 SINGLE SHAFT |
| Shaft Thread Length | 0.2000 INCHES NOMINAL SINGLE SHAFT IN |
| Shaft Length | 2.6330 INCHES NOMINAL SINGLE SHAFT IN |
| Maximum Total Null Voltage Output in Millivolts Per Volt | 60.00 |
| Pilot Length | 0.0370 INCHES MINIMUM AND 0.0430 INCHES MAXIMUM IN |
| Stator Input Current Rating | 24.0 MILLIAMPERES NOMINAL |
| Shaft Diameter | 0.1870 INCHES MINIMUM AND 0.1872 INCHES MAXIMUM SINGLE SHAFT IN |
| Material | STEEL CORROSION RESISTING BODY |
| Spline Tooth Quantity | 21 SINGLE SHAFT |
| Stator Input Electrical Power Rating | 600.0 MILLIWATTS NOMINAL |
| Test Data Document | 81349-MIL-S-20708 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.). |
| Phase Shift Angle in Deg | 8.000 INPUT TO OUTPUT NOMINAL |
| Electrical Error Angular Range in Minutes | -10.0 TO 10.0 |
| Maximum Fundamental Null Voltage in Millivolts Per Volt | 40.00 OUTPUT |
| Torque Gradient Per Angular Deg | 0.050 INCH-OUNCES MAXIMUM IN |
| Undercut Width | 0.0730 INCHES MINIMUM AND 0.0830 INCHES MAXIMUM IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| M20708/25-01B PRIMARY | Sae International Dba Sae International (USA) |
| 22217-2 | Whittaker Corp Whittaker Electronic Systems Div (USA) |
| MIL-S-20708 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| VTCB16-4C2 | General Dynamics Motion Control Llc (USA) |
| 2193025-2 | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| MIL-S-20708/25 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| SAE-AS20708/25 | Sae International Dba Sae International (USA) |
| 16CTB4B | General Dynamics Motion Control Llc (USA) |
NSN 5990-00-677-6476 is a Synchro,control Transformer, manufactured by Sae International Dba Sae International, classified under FSC 5990 (No Item Name Available). Status: cancelled.
NSN 5990-00-677-6476 has 8 cross-referenced part numbers: M20708/25-01B (Sae International Dba Sae International), 22217-2 (Whittaker Corp Whittaker Electronic Systems Div), MIL-S-20708 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), VTCB16-4C2 (General Dynamics Motion Control Llc), 2193025-2 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier) and 3 more.
There are 11 known substitutes for 5990-00-677-6476: 5990-00-018-9723, 4820-00-326-7134, 5990-00-503-4126 and 8 more. Verify interchangeability with system specifications before substitution.
Key specifications for M20708/25-01B: Transformation Ratio: 0.735 ROTOR TO STATOR NOMINAL; Shaft Nominal Thread Size: 0.184 INCHES SINGLE SHAFT IN; Shaft Thread Direction: RIGHT-HAND SINGLE SHAFT; Shaft Thread Class: 2A SINGLE SHAFT A. 30 total characteristics are documented in the Federal Logistics Information System.
NSN 5990-00-677-6476 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.