The Synchro,differential Transmitter, cataloged under National Stock Number 5990-00-644-0097, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. Government technical data includes 28 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5990-00-644-0097 |
| Item Name | Synchro,differential Transmitter |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Status | ACTIVE |
| Body Size | 23 |
| Shaft Type | ROUND, THREADED SINGLE SHAFT |
| Body Diameter | 1.9900 INCHES MAXIMUM IN |
| Flange Diameter | 2.2490 INCHES MINIMUM AND 2.2500 INCHES MAXIMUM IN |
| Shaft Diameter | 0.2402 INCHES MINIMUM AND 0.2405 INCHES MAXIMUM SINGLE SHAFT IN |
| Length | 0.2500 INCHES NOMINAL SHOULDER IN |
| Body Style | STANDARD ROUND D |
| Flange Thickness | 0.2500 INCHES NOMINAL IN |
| Stator Input Current Rating | 297.0 MILLIAMPERES NOMINAL |
| Spline Tooth Quantity | 22 SINGLE SHAFT |
| Shaft Thread Length | 0.3100 INCHES NOMINAL SINGLE SHAFT IN |
| Aft of First Flange Diameter | 1.9990 INCHES MINIMUM AND 1.9995 INCHES MAXIMUM IN |
| Mounting Surface to Terminal End Distance | 2.9040 INCHES NOMINAL IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Stator Input Electrical Power Rating | 4.0 WATTS NOMINAL |
| Terminal Location | REAR |
| Shaft Length | 0.6930 INCHES MINIMUM AND 0.7190 INCHES MAXIMUM SINGLE SHAFT IN |
| Specification/standard Data | 81349-MIL-S-16892 GOVERNMENT SPECIFICATION |
| Body Material | ALUMINUM |
| Pilot Diameter | 0.5950 INCHES NOMINAL IN |
| Second Shoulder Length | 0.1700 INCHES NOMINAL IN |
| Maximum Fundamental Null Voltage in Millivolts Per Volt | 50.00 OUTPUT |
| Shoulder Diameter | 1.9850 INCHES MINIMUM AND 1.9900 INCHES MAXIMUM IN |
| Shaft Nominal Thread Size | 0.250 INCHES SINGLE SHAFT IN |
| Stator Input Voltage Rating in Volts | 90.0 NOMINAL |
| Maximum Total Null Voltage Output in Millivolts Per Volt | 100.00 |
| Transformation Ratio | 1.154 ROTOR TO STATOR NOMINAL |
| Shaft Thread Direction | RIGHT-HAND SINGLE SHAFT |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| D10780 | 5/2 Secondary reference U.S. Government activity |
| MILS16892TYPE23CDX4 | 4/1 Identification reference U.S. Government activity |
NSN 5990-00-644-0097 is a Synchro,differential Transmitter, classified under FSC 5990, Synchros and Resolvers. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 7690-01-628-8668. Verify interchangeability with system specifications before substitution.
Key specifications for 5990-00-644-0097: Body Size: 23; Shaft Type: ROUND, THREADED SINGLE SHAFT; Body Diameter: 1.9900 INCHES MAXIMUM IN; Flange Diameter: 2.2490 INCHES MINIMUM AND 2.2500 INCHES MAXIMUM IN. 28 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 5990-00-644-0097 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.