The Synchro,differential Transmitter, cataloged under National Stock Number 5990-01-233-4178, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 22 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-01-233-4178 |
| Primary Part Number | 15A490-1 |
| Item Name | Synchro,differential Transmitter |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Body Size | 3 |
| Shaft Type | ROUND, SLOTTED SINGLE SHAFT |
| Body Diameter | 3.0980 INCHES MINIMUM AND 3.1000 INCHES MAXIMUM IN |
| Shaft Diameter | 0.2498 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM SINGLE SHAFT IN |
| Length | 1.2400 INCHES MAXIMUM SHOULDER IN |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | STANDARD ROUND, ROTATABLE HOUSING |
| Flange Thickness | 0.2490 INCHES MINIMUM AND 0.2510 INCHES MAXIMUM IN |
| Stator Input Current Rating | 0.7 AMPERES MAXIMUM |
| Mounting Surface to Terminal End Distance | 3.4400 INCHES MAXIMUM IN |
| Frequency in Hertz | 60.0 NOMINAL |
| Stator Input Electrical Power Rating | 13.0 WATTS MAXIMUM |
| Terminal Location | REAR |
| Schematic Diagram Designator | 1 Y-ROTOR, 1 Y-STATOR |
| Shaft Length | 0.3000 INCHES NOMINAL SINGLE SHAFT IN |
| Body Material | ALUMINUM |
| Shoulder Diameter | 2.7000 INCHES MAXIMUM IN |
| Stator Input Voltage Rating in Volts | 90.0 NOMINAL |
| Shaft Slot Width | 0.0300 INCHES MINIMUM AND 0.4000 INCHES MAXIMUM SINGLE SHAFT IN |
| Terminal Type and Quantity | 6 SOLDER LUG W/SCREW |
| Maximum Temp Rise | 65.0 CELSIUS DEGC |
| Shaft Slot Depth | 0.0450 INCHES MINIMUM AND 0.0600 INCHES MAXIMUM SINGLE SHAFT IN |
| 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 |
|---|---|
| 99X146 PIECE 9 | Northrop Grumman Systems Corporation (USA) |
| 15A490-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
NSN 5990-01-233-4178 is a Synchro,differential Transmitter, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-01-233-4178 has 2 manufacturer part numbers on file: 99X146 PIECE 9 (Northrop Grumman Systems Corporation), 15A490-1 (Northrop Grumman Systems Corporation).
Key specifications for 15A490-1: Body Size: 3; Shaft Type: ROUND, SLOTTED SINGLE SHAFT; Body Diameter: 3.0980 INCHES MINIMUM AND 3.1000 INCHES MAXIMUM IN; Shaft Diameter: 0.2498 INCHES MINIMUM AND 0.2500 INCHES MAXIMUM SINGLE SHAFT IN. 22 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.