The Synchro,control Transformer, cataloged under National Stock Number 5990-01-043-3400, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is L3 Technologies, Inc. Div L3 Keo. Government technical data includes 29 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-01-043-3400 |
| Primary Part Number | 054025 |
| Item Name | Synchro,control Transformer |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | L3 Technologies, Inc. Div L3 Keo |
| Status | ACTIVE |
| Body Size | 8 |
| Shaft Type | ROUND, SLOTTED SINGLE SHAFT |
| Shaft Radial Play Test Point | 0.125 INCHES MAXIMUM IN |
| Flange Diameter | 0.7500 INCHES MAXIMUM IN |
| Undercut Width | 0.0620 INCHES NOMINAL IN |
| Shaft Diameter | 0.0900 INCHES MAXIMUM SINGLE SHAFT IN |
| Rotor DC Resistance in Ohms | 365.00 NOMINAL |
| Undercut Diameter | 0.6910 INCHES MAXIMUM IN |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | STANDARD ROUND A |
| Shaft Radial Play Determining Weight | 4.0 OUNCES OZ |
| Flange Thickness | 0.0620 INCHES NOMINAL IN |
| Shaft Maximum Runout | 0.0010 INCHES IN |
| Stator Input Current Rating | 28.0 MILLIAMPERES NOMINAL |
| Mounting Surface to Terminal End Distance | 1.2410 INCHES MAXIMUM IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Zro Resistance in Ohms | 810.00 NOMINAL |
| Stator Input Electrical Power Rating | 750.0 MILLIWATTS MAXIMUM |
| Plus J Zso Reactance in Ohms | 1770.00 NOMINAL |
| Terminal Location | REAR |
| Shaft End Play Determining Weight | 8.0 OUNCES OZ |
| Shaft Maximum Radial Play | 0.0005 INCHES IN |
| Schematic Diagram Designator | 1 Y-ROTOR, 1 STATOR |
| Shaft Length | 0.3320 INCHES NOMINAL SINGLE SHAFT IN |
| Pilot Diameter | 0.5000 INCHES MAXIMUM IN |
| Maximum Fundamental Null Voltage in Millivolts Per Volt | 100.00 INPUT |
| Stator Input Voltage Rating in Volts | 90.0 NOMINAL |
| Maximum Total Null Voltage Output in Millivolts Per Volt | 125.00 |
| Shaft Slot Width | 0.0300 INCHES NOMINAL SINGLE SHAFT IN |
| 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 |
|---|---|
| 054025 PRIMARY | L3 Technologies, Inc. Div L3 Keo (USA) |
| B8CT-100-H-1 | American Precision Industries, Inc Div Portescap Us (USA) |
| Reference | Meaning |
|---|---|
| HTC-8-A-8/L915 | 5/2 Secondary reference U.S. Government activity |
| HCT-8-A-8/L915 | 5/9 Secondary reference U.S. Government activity |
| 887C054025 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
| 887C054025 | 5/9 Secondary reference L3 Technologies, Inc. Div L3 Keo |
NSN 5990-01-043-3400 is a Synchro,control Transformer, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-01-043-3400 has 2 manufacturer part numbers on file: 054025 (L3 Technologies, Inc. Div L3 Keo), B8CT-100-H-1 (American Precision Industries, Inc Div Portescap Us).
Key specifications for 054025: Body Size: 8; Shaft Type: ROUND, SLOTTED SINGLE SHAFT; Shaft Radial Play Test Point: 0.125 INCHES MAXIMUM IN; Flange Diameter: 0.7500 INCHES MAXIMUM IN. 29 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.