The Resolver,electrical, cataloged under National Stock Number 5990-00-421-3094, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Raytheon Company. Government technical data includes 29 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5990-00-421-3094 |
| Primary Part Number | 154557 |
| Item Name | Resolver,electrical |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | Raytheon Company |
| Status | ACTIVE |
| Body Size | 8 |
| Shaft Type | ROUND, SLOTTED SINGLE SHAFT |
| Flange Diameter | 0.7470 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN |
| Undercut Width | 0.0620 INCHES NOMINAL IN |
| Shaft Diameter | 0.0895 INCHES MINIMUM AND 0.0900 INCHES MAXIMUM SINGLE SHAFT IN |
| Rotor DC Resistance in Ohms | 230.00 NOMINAL |
| Undercut Diameter | 0.6880 INCHES MINIMUM AND 0.6910 INCHES MAXIMUM IN |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | STANDARD ROUND A |
| Flange Thickness | 0.0620 INCHES NOMINAL IN |
| Rotor Input Electrical Power Rating | 390.0 MILLIWATTS NOMINAL |
| Phase Shift Angle in Deg | 20.000 INPUT TO OUTPUT NOMINAL |
| Mounting Surface to Terminal End Distance | 1.2410 INCHES NOMINAL IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Zro Resistance in Ohms | 270.00 NOMINAL |
| Plus J Zso Reactance in Ohms | 142.00 NOMINAL |
| Zrs Resistance in Ohms | 340.00 NOMINAL |
| Terminal Location | REAR |
| Rotor Input Voltage Rating in Volts | 26.0 NOMINAL |
| Shaft Length | 0.3750 INCHES NOMINAL SINGLE SHAFT IN |
| Pilot Diameter | 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN |
| Maximum Total Null Voltage Output in Millivolts Per Volt | 30.00 |
| Shaft Slot Width | 0.0250 INCHES NOMINAL SINGLE SHAFT IN |
| Plus J Zro Reactance in Ohms | 630.00 NOMINAL |
| Transformation Ratio | 0.415 STATOR TO ROTOR NOMINAL |
| Pilot Length | 0.0400 INCHES NOMINAL IN |
| Zso Resistance in Ohms | 39.00 NOMINAL |
| Electrical Error Angular Range in Minutes | -5.0 TO 5.0 |
| Actuator Friction Torque at Plus 25 Deg Celsius | 3.0 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 |
| Part Number | Manufacturer |
|---|---|
| 154557 | Raytheon Company (USA) |
| 154557 | Raytheon Company Dba Raytheon Co (USA) |
| HSC-8-A-1/L493 | Moog Inc. (USA) |
| Reference | Meaning |
|---|---|
| 154557 | 5/9 Secondary reference Raytheon Company Div Corp |
| HSC8A1L493 | 5/9 Secondary reference Litton Precision Products Inc Clifton Precision Products Div |
| HSC8A1L493 | 3/2 Design control — primary reference U.S. Government activity |
| CM41034157 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5990-00-421-3094 is a Resolver,electrical, manufactured by Raytheon Company, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-00-421-3094 has 3 manufacturer part numbers on file: 154557 (Raytheon Company), 154557 (Raytheon Company Dba Raytheon Co), HSC-8-A-1/L493 (Moog Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5999-01-051-2206. Verify interchangeability with system specifications before substitution.
Key specifications for 154557: Body Size: 8; Shaft Type: ROUND, SLOTTED SINGLE SHAFT; Flange Diameter: 0.7470 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM 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.