The Synchro,receiver, cataloged under National Stock Number 5990-00-677-6505, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. Government technical data includes 13 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-00-677-6505 |
| Item Name | Synchro,receiver |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Status | ACTIVE |
| Shaft Type | SPLINE W/THREADS FRONT SHAFT |
| Body Style | STANDARD ROUND D |
| Rotor Input Electrical Power Rating | 6.6 WATTS MAXIMUM |
| Alignment Hole Bolt Circle Diameter | 2.3220 INCHES NOMINAL IN |
| Shaft Thread Length | 0.3100 INCHES NOMINAL FRONT SHAFT IN |
| Frequency in Hertz | 6.0 NOMINAL |
| Terminal Location | REAR |
| Rotor Input Voltage Rating in Volts | 115.0 NOMINAL |
| Nondefinitive Spec/std Data | 31TR6B TYPE |
| Transformation Ratio | 0.783 STATOR TO ROTOR NOMINAL |
| Plus J Zss Reactance in Ohms | 6.62 MINIMUM AND 13.47 MAXIMUM |
| Rotor Input Current Rating | 440.0 MILLIAMPERES MAXIMUM |
| Terminal Type and Quantity | 6 SCREW |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| MILS20708-66 | 4/1 Identification reference U.S. Government activity |
| 632482 | 5/1 Secondary reference Lockheed Martin Corporation Div Rms - Mitchel Field |
| 31TR6B | 2/2 Government specification standardization U.S. Government activity |
NSN 5990-00-677-6505 is a Synchro,receiver, classified under FSC 5990, Synchros and Resolvers. Status: active.
Key specifications for 5990-00-677-6505: Shaft Type: SPLINE W/THREADS FRONT SHAFT; Body Style: STANDARD ROUND D; Rotor Input Electrical Power Rating: 6.6 WATTS MAXIMUM; Alignment Hole Bolt Circle Diameter: 2.3220 INCHES NOMINAL IN. 13 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.