The Synchro,transmitter, cataloged under National Stock Number 5990-00-803-0486, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Aero International, Llc Dba Ams Engineered Solutions. 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-00-803-0486 |
| Primary Part Number | AY201S4B1 |
| Item Name | Synchro,transmitter |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | Aero International, Llc Dba Ams Engineered Solutions |
| Status | ACTIVE |
| Body Size | 15 |
| Shaft Type | ROUND, SLOTTED SINGLE SHAFT |
| Zso-90 Resistance in Ohms | 6.10 NOMINAL |
| Flange Diameter | 1.4360 INCHES MINIMUM AND 1.4370 INCHES MAXIMUM IN |
| Undercut Width | 0.0780 INCHES NOMINAL IN |
| Shaft Diameter | 0.1195 INCHES MINIMUM AND 0.1200 INCHES MAXIMUM SINGLE SHAFT IN |
| Rotor DC Resistance in Ohms | 16.00 NOMINAL |
| 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 | 2250.0 MILLIMETER-MILLIGRAMS NOMINAL MM |
| Plus J Zso-90 Reactance in Ohms | 12.50 NOMINAL |
| Rotor Input Electrical Power Rating | 600.0 MILLIWATTS MAXIMUM |
| Alignment Hole Bolt Circle Diameter | 0.8750 INCHES NOMINAL IN |
| Phase Shift Angle in Deg | 3.000 INPUT TO OUTPUT NOMINAL |
| Mounting Surface to Terminal End Distance | 1.5910 INCHES NOMINAL IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Zro Resistance in Ohms | 47.00 NOMINAL |
| Plus J Zso Reactance in Ohms | 43.00 NOMINAL |
| Zrs Resistance in Ohms | 44.00 NOMINAL |
| Terminal Location | REAR |
| Rotor Input Voltage Rating in Volts | 26.0 NOMINAL |
| Alignment Hole Quantity | 4 |
| Shaft Length | 0.5400 INCHES NOMINAL SINGLE SHAFT IN |
| Body Material | STEEL CORROSION RESISTING |
| Pilot Diameter | 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN |
| Shoulder Diameter | 1.3115 INCHES MINIMUM AND 1.3120 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| AY201S4B1 | Aero International, Llc Dba Ams Engineered Solutions (USA) |
| Reference | Meaning |
|---|---|
| AY201S4B1 | 5/9 Secondary reference Honeywell Intl Inc Defense Avionics Systems |
| AY201S4B1 | 3/2 Design control — primary reference U.S. Government activity |
| QB71950-4 | C/1 Advisory reference — outside the item-of-supply concept Honeywell Intl Inc Defense Avionics Systems Former Bendix Navigation and Control Systems |
| QB71950-4 | C/1 Advisory reference — outside the item-of-supply concept Bendix Corp the |
NSN 5990-00-803-0486 is a Synchro,transmitter, manufactured by Aero International, Llc Dba Ams Engineered Solutions, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-00-803-0486 has 1 manufacturer part number on file: AY201S4B1 (Aero International, Llc Dba Ams Engineered Solutions).
Key specifications for AY201S4B1: Body Size: 15; Shaft Type: ROUND, SLOTTED SINGLE SHAFT; Zso-90 Resistance in Ohms: 6.10 NOMINAL; Flange Diameter: 1.4360 INCHES MINIMUM AND 1.4370 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 5990-00-803-0486 has DEMIL Code B. 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.