The Synchro,differential Transmitter, cataloged under National Stock Number 5990-00-993-1780, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. Government technical data includes 29 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5990-00-993-1780 |
| Item Name | Synchro,differential Transmitter |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Status | ACTIVE |
| Body Size | 10 |
| Shaft Type | ROUND SINGLE SHAFT |
| Flange Diameter | 0.9360 INCHES MINIMUM AND 0.9370 INCHES MAXIMUM IN |
| Undercut Width | 0.0590 INCHES MINIMUM AND 0.0650 INCHES MAXIMUM IN |
| Shaft Diameter | 0.0895 INCHES MINIMUM AND 0.0900 INCHES MAXIMUM SINGLE SHAFT IN |
| Rotor DC Resistance in Ohms | 30.60 MINIMUM AND 41.40 MAXIMUM |
| Undercut Diameter | 0.8370 INCHES NOMINAL IN |
| Length | 0.0630 INCHES NOMINAL SHOULDER IN |
| Body Style | STANDARD ROUND C |
| Flange Thickness | 0.0590 INCHES MINIMUM AND 0.0650 INCHES MAXIMUM IN |
| Stator Input Current Rating | 96.0 MILLIAMPERES NOMINAL |
| Phase Shift Angle in Deg | 7.200 INPUT TO OUTPUT MINIMUM AND 10.800 INPUT TO OUTPUT MAXIMUM |
| Mounting Surface to Terminal End Distance | 1.2410 INCHES NOMINAL IN |
| Frequency in Hertz | 396.0 MINIMUM AND 404.0 MAXIMUM |
| Zro Resistance in Ohms | 38.00 NOMINAL |
| Stator Input Electrical Power Rating | 252.0 MILLIWATTS NOMINAL |
| Plus J Zso Reactance in Ohms | 114.00 NOMINAL |
| Zrs Resistance in Ohms | 47.00 NOMINAL |
| Terminal Location | REAR |
| Shaft Length | 0.3960 INCHES MINIMUM AND 0.4340 INCHES MAXIMUM SINGLE SHAFT IN |
| Pilot Diameter | 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN |
| Shoulder Diameter | 0.8118 INCHES MINIMUM AND 0.8123 INCHES MAXIMUM IN |
| Stator Input Voltage Rating in Volts | 11.7 MINIMUM AND 11.9 MAXIMUM |
| Plus J Zro Reactance in Ohms | 122.00 NOMINAL |
| Pilot Length | 0.0370 INCHES MINIMUM AND 0.0430 INCHES MAXIMUM IN |
| Zso Resistance in Ohms | 28.00 NOMINAL |
| Electrical Error Angular Range in Minutes | -10.0 TO 10.0 |
| Actuator Friction Torque at Plus 25 Deg Celsius | 3.0 CENTIMETER-GRAMS NOMINAL CM |
| Actuator Friction Torque at Minus 55 Deg Celsius | 15.0 CENTIMETER-GRAMS NOMINAL CM |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 464075-1 | 5/2 Secondary reference U.S. Government activity |
| CDF10L1L090 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5990-00-993-1780 is a Synchro,differential Transmitter, classified under FSC 5990, Synchros and Resolvers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5998-01-475-8289. Verify interchangeability with system specifications before substitution.
Key specifications for 5990-00-993-1780: Body Size: 10; Shaft Type: ROUND SINGLE SHAFT; Flange Diameter: 0.9360 INCHES MINIMUM AND 0.9370 INCHES MAXIMUM IN; Undercut Width: 0.0590 INCHES MINIMUM AND 0.0650 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.