The Synchro,control Transformer, cataloged under National Stock Number 5990-00-940-3085, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is American Precision Industries, Inc Div Portescap Us. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-00-940-3085 |
| Primary Part Number | 8CT-300-B-7 |
| Item Name | Synchro,control Transformer |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | American Precision Industries, Inc Div Portescap Us |
| 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 | 292.00 MINIMUM AND 438.00 MAXIMUM |
| 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 | 35.0 MILLIAMPERES MAXIMUM |
| Phase Shift Angle in Deg | 8.500 OUTPUT TO INPUT MAXIMUM |
| Mounting Surface to Terminal End Distance | 1.2400 INCHES MAXIMUM IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Zro Resistance in Ohms | 480.00 NOMINAL |
| Stator Input Electrical Power Rating | 73.0 MILLIWATTS MAXIMUM |
| Plus J Zso Reactance in Ohms | 330.00 NOMINAL |
| Zrs Resistance in Ohms | 590.00 NOMINAL |
| Terminal Location | REAR |
| Shaft End Play Determining Weight | 8.0 OUNCES OZ |
| Shaft Maximum Radial Play | 0.0010 INCHES IN |
| Schematic Diagram Designator | 1 Y-ROTOR, 1 STATOR |
| Shaft Length | 0.2850 INCHES NOMINAL SINGLE SHAFT IN |
| Pilot Diameter | 0.5000 INCHES MAXIMUM IN |
| Stator Input Voltage Rating in Volts | 11.8 NOMINAL |
| Maximum Total Null Voltage Output in Millivolts Per Volt | 40.00 |
| 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 |
|---|---|
| 8CT-300-B-7 | American Precision Industries, Inc Div Portescap Us (USA) |
| 8CT-100-B-3 | American Precision Industries, Inc Div Portescap Us (USA) |
| Reference | Meaning |
|---|---|
| 75002011501 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5990-00-940-3085 is a Synchro,control Transformer, manufactured by American Precision Industries, Inc Div Portescap Us, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-00-940-3085 has 2 manufacturer part numbers on file: 8CT-300-B-7 (American Precision Industries, Inc Div Portescap Us), 8CT-100-B-3 (American Precision Industries, Inc Div Portescap Us).
Key specifications for 8CT-300-B-7: 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.