The Synchro,control Transformer, cataloged under National Stock Number 5990-00-929-8923, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Ge Aviation Systems Llc. Government technical data includes 28 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-00-929-8923 |
| Primary Part Number | 139058-04 |
| Item Name | Synchro,control Transformer |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | Ge Aviation Systems Llc |
| Status | ACTIVE |
| Body Size | 8 |
| Shaft Type | ROUND, SLOTTED SINGLE SHAFT |
| Flange Diameter | 0.7490 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN |
| Undercut Width | 0.0620 INCHES NOMINAL IN |
| Shaft Diameter | 0.0900 INCHES NOMINAL SINGLE SHAFT IN |
| Rotor DC Resistance in Ohms | 333.00 NOMINAL |
| Undercut Diameter | 0.6880 INCHES MINIMUM AND 0.6910 INCHES MAXIMUM IN |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | STANDARD ROUND A |
| Flange Thickness | 0.0620 INCHES NOMINAL IN |
| Stator Input Current Rating | 33.0 MILLIAMPERES NOMINAL |
| Mounting Surface to Terminal End Distance | 1.2410 INCHES MAXIMUM IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Stator Input Electrical Power Rating | 88.0 MILLIWATTS NOMINAL |
| Terminal Location | REAR |
| Shaft Length | 0.4310 INCHES NOMINAL SINGLE SHAFT IN |
| Pilot Diameter | 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN |
| Stator Input Voltage Rating in Volts | 26.0 NOMINAL |
| Maximum Total Null Voltage Output in Millivolts Per Volt | 0.03 |
| Shaft Slot Width | 0.0200 INCHES NOMINAL SINGLE SHAFT IN |
| Transformation Ratio | 2.205 ROTOR TO STATOR NOMINAL |
| Pilot Length | 0.0430 INCHES NOMINAL IN |
| Actuator Friction Torque at Plus 25 Deg Celsius | 3.00 CENTIMETER-GRAMS MAXIMUM CM |
| Actuator Friction Torque at Minus 55 Deg Celsius | 9.00 CENTIMETER-GRAMS MAXIMUM CM |
| Material | STEEL CORROSION RESISTING BODY |
| Terminal Type and Quantity | 5 WIRE LEAD |
| Stator DC Resistance in Ohms | 63.00 NOMINAL |
| Shaft Slot Depth | 0.0250 INCHES NOMINAL SINGLE SHAFT IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 08CT192-4 | Ametek Technical & Industrial Products, Inc. Dba Tachtronic Instruments Division Div Ametek Technical and Industrial Products, Inc. (USA) |
| 139058-04 PRIMARY | Ge Aviation Systems Llc (USA) |
| 8CT-300-B-59A | American Precision Industries, Inc Div Portescap Us (USA) |
NSN 5990-00-929-8923 is a Synchro,control Transformer, manufactured by Ge Aviation Systems Llc, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-00-929-8923 has 3 manufacturer part numbers on file: 08CT192-4 (Ametek Technical & Industrial Products, Inc. Dba Tachtronic Instruments Division Div Ametek Technical and Industrial Products, Inc.), 139058-04 (Ge Aviation Systems Llc), 8CT-300-B-59A (American Precision Industries, Inc Div Portescap Us).
Key specifications for 139058-04: Body Size: 8; Shaft Type: ROUND, SLOTTED SINGLE SHAFT; Flange Diameter: 0.7490 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN; Undercut Width: 0.0620 INCHES NOMINAL IN. 28 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 5990-00-929-8923 has DEMIL Code D. 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.