The Synchro,control Transformer, cataloged under National Stock Number 5990-00-901-8709, 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29 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5990-00-901-8709 |
| Item Name | Synchro,control Transformer |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Status | ACTIVE |
| Body Size | 11 |
| Shaft Type | ROUND, SLOTTED SINGLE SHAFT |
| Flange Diameter | 1.0610 INCHES MINIMUM AND 1.0620 INCHES MAXIMUM IN |
| Undercut Width | 0.0450 INCHES MINIMUM AND 0.0550 INCHES MAXIMUM IN |
| Shaft Diameter | 0.1195 INCHES MINIMUM AND 0.1200 INCHES MAXIMUM SINGLE SHAFT IN |
| Rotor DC Resistance in Ohms | 365.00 NOMINAL |
| Undercut Diameter | 0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN |
| Length | 0.0590 INCHES MINIMUM AND 0.0650 INCHES MAXIMUM SHOULDER IN |
| Body Style | STANDARD ROUND C |
| Shaft Radial Play Determining Weight | 4.0 OUNCES OZ |
| Flange Thickness | 0.0880 INCHES MINIMUM AND 0.0980 INCHES MAXIMUM IN |
| Shaft Maximum Runout | 0.0010 INCHES IN |
| Stator Input Current Rating | 18.2 MILLIAMPERES NOMINAL |
| Alignment Hole Bolt Circle Diameter | 0.8090 INCHES MINIMUM AND 0.8150 INCHES MAXIMUM IN |
| Phase Shift Angle in Deg | 4.000 INPUT TO OUTPUT NOMINAL |
| Mounting Surface to Terminal End Distance | 1.8350 INCHES MAXIMUM IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Zro Resistance in Ohms | 650.00 NOMINAL |
| Stator Input Electrical Power Rating | 30.0 MILLIWATTS NOMINAL |
| Plus J Zso Reactance in Ohms | 550.00 NOMINAL |
| Zrs Resistance in Ohms | 605.00 NOMINAL |
| Terminal Location | REAR |
| Shaft Maximum Radial Play | 0.0005 INCHES IN |
| Schematic Diagram Designator | 1 Y-ROTOR, 1 STATOR |
| Alignment Hole Quantity | 4 |
| Shaft Length | 0.3590 INCHES MINIMUM AND 0.3910 INCHES MAXIMUM SINGLE SHAFT IN |
| Pilot Diameter | 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN |
| Maximum Fundamental Null Voltage in Millivolts Per Volt | 30.00 OUTPUT |
| Shoulder Diameter | 0.9995 INCHES MINIMUM AND 1.0000 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 11CT901-8709 | 5/9 Secondary reference Motion Devices Technology, Inc. |
| ETH-11-E-4 | 3/9 Design control — primary reference Moog Inc. |
| ETH-11-E-4 | 5/9 Secondary reference U.S. Government activity |
NSN 5990-00-901-8709 is a Synchro,control Transformer, classified under FSC 5990, Synchros and Resolvers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5990-00-930-4665. Verify interchangeability with system specifications before substitution.
Key specifications for 5990-00-901-8709: Body Size: 11; Shaft Type: ROUND, SLOTTED SINGLE SHAFT; Flange Diameter: 1.0610 INCHES MINIMUM AND 1.0620 INCHES MAXIMUM IN; Undercut Width: 0.0450 INCHES MINIMUM AND 0.0550 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.
NSN 5990-00-901-8709 has DEMIL Code Q. 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.