The Synchro,control Transformer, cataloged under National Stock Number 5990-00-644-0134, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 17 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-00-644-0134 |
| Primary Part Number | 979388 |
| Item Name | Synchro,control Transformer |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| Body Size | 16 |
| Shaft Type | SPLINE W/THREADS SINGLE SHAFT |
| Shaft Diameter | 0.1872 INCHES NOMINAL SINGLE SHAFT IN |
| Stator Input Current Rating | 24.0 MILLIAMPERES NOMINAL |
| Spline Tooth Quantity | 21 SINGLE SHAFT |
| Frequency in Hertz | 400.0 NOMINAL |
| Stator Input Electrical Power Rating | 600.0 MILLIWATTS NOMINAL |
| Shaft Length | 0.5000 INCHES NOMINAL SINGLE SHAFT IN |
| Spline Tooth Diametral Pitch | 120 SINGLE SHAFT |
| Nondefinitive Spec/std Data | 16CTBMK21-0D1 TYPE |
| Shaft Nominal Thread Size | 0.1900 INCHES SINGLE SHAFT IN |
| Stator Input Voltage Rating in Volts | 115.0 NOMINAL |
| Transformation Ratio | 0.735 ROTOR TO STATOR NOMINAL |
| Shaft Thread Direction | RIGHT-HAND SINGLE SHAFT |
| Shaft Thread Series Designator | UNF SINGLE SHAFT |
| Terminal Type and Quantity | 5 SOLDER STUD |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 979388 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 979387 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| LD266549 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| MILS16892TYPE16CTB4AMK21M0D1 | 4/1 Identification reference U.S. Government activity |
NSN 5990-00-644-0134 is a Synchro,control Transformer, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-00-644-0134 has 3 manufacturer part numbers on file: 979388 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 979387 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), LD266549 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 979388: Body Size: 16; Shaft Type: SPLINE W/THREADS SINGLE SHAFT; Shaft Diameter: 0.1872 INCHES NOMINAL SINGLE SHAFT IN; Stator Input Current Rating: 24.0 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.