The Synchro,receiver-Transmitter, cataloged under National Stock Number 5990-00-441-7974, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Sae International Dba Sae International. Government technical data includes 29 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5990-00-441-7974 |
| Primary Part Number | M20708/23-01A |
| Item Name | Synchro,receiver-Transmitter |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | Sae International Dba Sae International |
| Status | ACTIVE |
| Body Size | 15 |
| Shaft Type | SPLINE W/THREADS SINGLE SHAFT |
| Flange Diameter | 1.4340 INCHES MINIMUM AND 1.4370 INCHES MAXIMUM IN |
| Zss Impedance Magnitude in Ohms | 920.00 MAXIMUM |
| Undercut Width | 0.0780 INCHES NOMINAL IN |
| Shaft Diameter | 0.1867 INCHES MINIMUM AND 0.1872 INCHES MAXIMUM SINGLE SHAFT IN |
| Undercut Diameter | 1.3120 INCHES NOMINAL IN |
| Length | 0.1320 INCHES NOMINAL SHOULDER IN |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | STANDARD ROUND C |
| Flange Thickness | 0.0930 INCHES NOMINAL IN |
| Torque Gradient Per Angular Deg | 0.030 INCH-OUNCES MINIMUM IN |
| Rotor Input Electrical Power Rating | 2.8 WATTS MAXIMUM |
| Alignment Hole Bolt Circle Diameter | 1.1000 INCHES NOMINAL IN |
| Spline Tooth Quantity | 21 SINGLE SHAFT |
| Shaft Thread Length | 0.2000 INCHES NOMINAL SINGLE SHAFT IN |
| Phase Shift Angle in Deg | 20.000 INPUT TO OUTPUT MAXIMUM |
| Mounting Surface to Terminal End Distance | 1.7720 INCHES MAXIMUM IN |
| Frequency in Hertz | 60.0 NOMINAL |
| Terminal Location | REAR |
| Rotor Input Voltage Rating in Volts | 115.0 NOMINAL |
| Alignment Hole Quantity | 4 |
| Shaft Length | 0.5550 INCHES NOMINAL SINGLE SHAFT IN |
| Specification/standard Data | 81349-MIL-S-20708/23 GOVERNMENT SPECIFICATION |
| Pilot Diameter | 0.8745 INCHES MINIMUM AND 0.8750 INCHES MAXIMUM IN |
| Spline Tooth Diametral Pitch | 120 SINGLE SHAFT |
| Maximum Fundamental Null Voltage in Millivolts Per Volt | 50.00 OUTPUT |
| Shoulder Diameter | 1.3115 INCHES MINIMUM AND 1.3120 INCHES MAXIMUM IN |
| Shaft Nominal Thread Size | 0.190 INCHES SINGLE SHAFT IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| M20708/23-01A PRIMARY | Sae International Dba Sae International (USA) |
| Reference | Meaning |
|---|---|
| SAE-AS20708/23 | 3/1 Design control — primary reference Sae International Dba Sae International |
| MIL-S-20708/23 | 5/9 Secondary reference U.S. Government activity |
| M20708/23-01A | 5/9 Secondary reference U.S. Government activity |
| 15TRX6A | 5/1 Secondary reference U.S. Government activity |
| M20708/23-001 | 5/9 Secondary reference U.S. Government activity |
NSN 5990-00-441-7974 is a Synchro,receiver-Transmitter, manufactured by Sae International Dba Sae International, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-00-441-7974 has 1 manufacturer part number on file: M20708/23-01A (Sae International Dba Sae International).
1 possible match (shared part number, not a government interchangeability claim): 5990-00-688-4775. Verify interchangeability with system specifications before substitution.
Key specifications for M20708/23-01A: Body Size: 15; Shaft Type: SPLINE W/THREADS SINGLE SHAFT; Flange Diameter: 1.4340 INCHES MINIMUM AND 1.4370 INCHES MAXIMUM IN; Zss Impedance Magnitude in Ohms: 920.00 MAXIMUM. 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 5990-00-441-7974 has DEMIL Code D. 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.