The Synchro,control Transformer, cataloged under National Stock Number 5990-00-050-1668, 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5990-00-050-1668 |
| Primary Part Number | 8CT302C7 |
| 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 |
| Flange Diameter | 0.7500 INCHES NOMINAL IN |
| Undercut Width | 0.0620 INCHES NOMINAL IN |
| Shaft Diameter | 0.0880 INCHES MINIMUM AND 0.0900 INCHES MAXIMUM SINGLE SHAFT IN |
| Rotor DC Resistance in Ohms | 550.00 NOMINAL |
| Undercut Diameter | 0.6910 INCHES NOMINAL IN |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | STANDARD ROUND A |
| Flange Thickness | 0.0620 INCHES NOMINAL IN |
| Stator Input Current Rating | 22.0 MILLIAMPERES NOMINAL |
| Phase Shift Angle in Deg | 11.000 INPUT TO OUTPUT NOMINAL |
| Mounting Surface to Terminal End Distance | 1.3680 INCHES NOMINAL IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Zro Resistance in Ohms | 800.00 NOMINAL |
| Stator Input Electrical Power Rating | 58.0 MILLIWATTS NOMINAL |
| Plus J Zso Reactance in Ohms | 450.00 NOMINAL |
| Zrs Resistance in Ohms | 940.00 NOMINAL |
| Terminal Location | REAR |
| Shaft Length | 0.5430 INCHES NOMINAL SINGLE SHAFT IN |
| Pilot Diameter | 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN |
| Maximum Fundamental Null Voltage in Millivolts Per Volt | 22.00 OUTPUT |
| Stator Input Voltage Rating in Volts | 11.8 NOMINAL |
| Maximum Total Null Voltage Output in Millivolts Per Volt | 30.00 |
| Shaft Slot Width | 0.0200 INCHES NOMINAL SINGLE SHAFT IN |
| Plus J Zro Reactance in Ohms | 2500.00 NOMINAL |
| Pilot Length | 0.0430 INCHES NOMINAL IN |
| Zso Resistance in Ohms | 120.00 NOMINAL |
| Electrical Error Angular Range in Minutes | -7.0 TO 7.0 |
| 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 |
|---|---|
| 193149-2 | Raytheon Company (USA) |
| 8CT302C7 PRIMARY | American Precision Industries, Inc Div Portescap Us (USA) |
| Reference | Meaning |
|---|---|
| AY080CD45A1 | 5/9 Secondary reference Honeywell Intl Inc Defense Avionics Systems |
| AY080CD45A1 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| CM91004005 | 3/2 Design control — primary reference U.S. Government activity |
| B81A0003 | 5/9 Secondary reference Mcdonnell Douglas Corp Mcdonnell Douglas Electronic Systems Co |
| ETH8F6 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5990-00-050-1668 is a Synchro,control Transformer, manufactured by American Precision Industries, Inc Div Portescap Us, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-00-050-1668 has 2 manufacturer part numbers on file: 193149-2 (Raytheon Company), 8CT302C7 (American Precision Industries, Inc Div Portescap Us).
1 possible match (shared part number, not a government interchangeability claim): 6550-01-356-3824. Verify interchangeability with system specifications before substitution.
Key specifications for 8CT302C7: Body Size: 8; Shaft Type: ROUND, SLOTTED SINGLE SHAFT; Flange Diameter: 0.7500 INCHES NOMINAL IN; Undercut Width: 0.0620 INCHES NOMINAL 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.