The Synchro,control Transformer, cataloged under National Stock Number 5990-00-503-0433, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Lockheed Martin Corporation Div Rms - Mitchel Field. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-00-503-0433 |
| Primary Part Number | 658742 |
| Item Name | Synchro,control Transformer |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | Lockheed Martin Corporation Div Rms - Mitchel Field |
| Status | ACTIVE |
| Body Size | 17 |
| Shaft Type | ROUND SINGLE SHAFT |
| Shaft Diameter | 0.1198 INCHES NOMINAL SINGLE SHAFT IN |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | ROUND, SQUARE MOUNTING FLANGE |
| Flange Thickness | 0.1250 INCHES NOMINAL IN |
| Stator Input Current Rating | 25.0 MILLIAMPERES NOMINAL |
| Securing Hole Bolt Circle Diameter | 1.5000 INCHES NOMINAL IN |
| Mounting Surface to Terminal End Distance | 1.2500 INCHES NOMINAL IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Zro Resistance in Ohms | 220.00 NOMINAL |
| Stator Input Electrical Power Rating | 73.0 MILLIWATTS NOMINAL |
| Terminal Location | REAR |
| Flange Length | 1.6220 INCHES NOMINAL IN |
| Shaft Length | 0.3120 INCHES NOMINAL SINGLE SHAFT IN |
| Stator Input Voltage Rating in Volts | 5.0 NOMINAL |
| Securing Hole Quantity | 4 |
| Plus J Zro Reactance in Ohms | 88.00 NOMINAL |
| Transformation Ratio | 2.100 ROTOR TO STATOR NOMINAL |
| Flange Width | 1.6220 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING BODY |
| Terminal Type and Quantity | 5 WIRE LEAD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 658742 PRIMARY | Lockheed Martin Corporation Div Rms - Mitchel Field (USA) |
NSN 5990-00-503-0433 is a Synchro,control Transformer, manufactured by Lockheed Martin Corporation Div Rms - Mitchel Field, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-00-503-0433 has 1 manufacturer part number on file: 658742 (Lockheed Martin Corporation Div Rms - Mitchel Field).
1 possible match (shared part number, not a government interchangeability claim): 3990-01-496-4022. Verify interchangeability with system specifications before substitution.
Key specifications for 658742: Body Size: 17; Shaft Type: ROUND SINGLE SHAFT; Shaft Diameter: 0.1198 INCHES NOMINAL SINGLE SHAFT IN; Fragility Factor: MODERATELY RUGGED. 22 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.
NSN 5990-00-503-0433 has DEMIL Code B. Demilitarization may be required before disposal or transfer to non-military entities.
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.