The Synchro,control Transformer, cataloged under National Stock Number 5990-00-677-6478, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. Government technical data includes 17 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-00-677-6478 |
| Item Name | Synchro,control Transformer |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Status | ACTIVE |
| Body Size | 18 |
| Shaft Type | SPLINE W/THREADS SINGLE SHAFT |
| Shaft Diameter | 0.1872 INCHES NOMINAL SINGLE SHAFT IN |
| Stator Input Current Rating | 103.0 MILLIAMPERES NOMINAL |
| Spline Tooth Quantity | 13 SINGLE SHAFT |
| Shaft Thread Length | 0.1870 INCHES NOMINAL SINGLE SHAFT IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Stator Input Electrical Power Rating | 218.0 MILLIWATTS NOMINAL |
| Shaft Length | 0.4310 INCHES NOMINAL SINGLE SHAFT IN |
| Spline Tooth Diametral Pitch | 120 SINGLE SHAFT |
| Shaft Nominal Thread Size | 0.125 INCHES SINGLE SHAFT IN |
| Stator Input Voltage Rating in Volts | 10.2 NOMINAL |
| Transformation Ratio | 2.203 ROTOR TO STATOR NOMINAL |
| Shaft Thread Direction | RIGHT-HAND SINGLE SHAFT |
| Shaft Thread Series Designator | UNF SINGLE SHAFT |
| Terminal Type and Quantity | 5 WIRE LEAD |
| Shaft Thread Class | 2A SINGLE SHAFT A |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| SAE-AS20708/29 | 3/1 Design control — primary reference Sae International Dba Sae International |
| MILS20708-29 | 5/9 Secondary reference U.S. Government activity |
NSN 5990-00-677-6478 is a Synchro,control Transformer, classified under FSC 5990, Synchros and Resolvers. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 5990-00-928-5593, 5990-00-951-5114. Verify interchangeability with system specifications before substitution.
Key specifications for 5990-00-677-6478: Body Size: 18; Shaft Type: SPLINE W/THREADS SINGLE SHAFT; Shaft Diameter: 0.1872 INCHES NOMINAL SINGLE SHAFT IN; Stator Input Current Rating: 103.0 MILLIAMPERES NOMINAL. 17 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.