The Synchro,control Transformer, cataloged under National Stock Number 5990-00-644-0120, 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 12 commercial cross-references from 7 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 5990-00-644-0120 |
| Primary Part Number | 7674821 |
| Item Name | Synchro,control Transformer |
| FSC / FSG | 5990 / 59 — No Item Name Available |
| Manufacturer | Sae International Dba Sae International |
| Status | CANCELLED |
| Body Size | 23 |
| Shaft Thread Series Designator | UNF SINGLE SHAFT |
| Shaft Thread Length | 0.3100 INCHES NOMINAL SINGLE SHAFT IN |
| Aft of First Flange Diameter | 1.9985 INCHES MINIMUM AND 1.9995 INCHES MAXIMUM IN |
| Shaft Nominal Thread Size | 0.250 INCHES SINGLE SHAFT IN |
| Transformation Ratio | 0.735 ROTOR TO STATOR NOMINAL |
| Stator Input Current Rating | 6.0 MILLIAMPERES MAXIMUM |
| Test Data Document | 81349-MIL-S-16892 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.). |
| Stator Input Voltage Rating in Volts | 90.0 NOMINAL |
| Mounting Surface to Terminal End Distance | 3.4350 INCHES MINIMUM AND 3.4450 INCHES MAXIMUM IN |
| Actuator Friction Torque at Plus 25 Deg Celsius | 0.20 INCH-OUNCES MAXIMUM IN |
| Stator Input Electrical Power Rating | 240.0 MILLIWATTS MAXIMUM |
| Maximum Fundamental Null Voltage in Millivolts Per Volt | 30.00 OUTPUT |
| Maximum Total Null Voltage Output in Millivolts Per Volt | 60.00 |
| Frequency in Hertz | 400.0 NOMINAL |
| Actuator Friction Torque at Minus 55 Deg Celsius | 0.50 INCH-OUNCES MAXIMUM IN |
| Shaft Thread Class | 3A SINGLE SHAFT A |
| Shaft Length | 0.6930 INCHES MINIMUM AND 0.7190 INCHES MAXIMUM SINGLE SHAFT IN |
| Terminal Type and Quantity | 7 SCREW |
| Material | ALUMINUM BODY |
| Shaft Diameter | 0.2402 INCHES MINIMUM AND 0.2405 INCHES MAXIMUM SINGLE SHAFT IN |
| Electrical Error Angular Range in Minutes | -6.0 TO 6.0 |
| Terminal Location | REAR |
| Pilot Length | 0.0460 INCHES NOMINAL IN |
| Shaft Type | ROUND, THREADED SINGLE SHAFT |
| Shaft Thread Direction | RIGHT-HAND SINGLE SHAFT |
| Pilot Diameter | 0.5900 INCHES MINIMUM AND 0.6000 INCHES MAXIMUM IN |
| Second Shoulder Diameter | 1.9985 INCHES MINIMUM AND 1.9995 INCHES MAXIMUM IN |
| Body Diameter | 1.9900 INCHES MAXIMUM IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| AY240AA 2 A1 | Honeywell Intl Inc Defense Avionics Systems (USA) |
| CT23-4X2 | General Dynamics Motion Control Llc (USA) |
| 23CT4 | Northrop Grumman Systems Corporation (USA) |
| VCT23/36/-4A | General Dynamics Motion Control Llc (USA) |
| 23CT4 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 7674821 | Army, United States Department of the Dba Rock Island Arsenal Jmtc (USA) |
| 7674821 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 7674821 PRIMARY | Sae International Dba Sae International (USA) |
| MIL-S-20708/94 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| SAE-AS20708/94 | Sae International Dba Sae International (USA) |
| C767482100 | Northrop Grumman Systems Corporation (USA) |
| SM-D-209752-5 | Us Army Communications & Electronics Materiel Readiness Command Logistics Engineering Dir (USA) |
NSN 5990-00-644-0120 is a Synchro,control Transformer, manufactured by Sae International Dba Sae International, classified under FSC 5990 (No Item Name Available). Status: cancelled.
NSN 5990-00-644-0120 has 12 cross-referenced part numbers: AY240AA 2 A1 (Honeywell Intl Inc Defense Avionics Systems), CT23-4X2 (General Dynamics Motion Control Llc), 23CT4 (Northrop Grumman Systems Corporation), VCT23/36/-4A (General Dynamics Motion Control Llc), 23CT4 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 7 more.
There are 12 known substitutes for 5990-00-644-0120: 5990-00-553-6711, 5990-00-636-4111, 5990-00-636-4119 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 7674821: Body Size: 23; Shaft Thread Series Designator: UNF SINGLE SHAFT; Shaft Thread Length: 0.3100 INCHES NOMINAL SINGLE SHAFT IN; Aft of First Flange Diameter: 1.9985 INCHES MINIMUM AND 1.9995 INCHES MAXIMUM IN. 30 total characteristics are documented in the Federal Logistics Information System.
NSN 5990-00-644-0120 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.