The Synchro,transmitter, cataloged under National Stock Number 5990-00-503-2840, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is L3harris Technologies, Inc Div Space & Airborne Systems. Government technical data includes 16 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5990-00-503-2840 |
| Primary Part Number | 44989 |
| Item Name | Synchro,transmitter |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | L3harris Technologies, Inc Div Space & Airborne Systems |
| Status | ACTIVE |
| Shaft Type | ROUND, THREADED SINGLE SHAFT |
| Flange Diameter | 3.6250 INCHES NOMINAL IN |
| Shaft Diameter | 0.2500 INCHES NOMINAL SINGLE SHAFT IN |
| Torque Gradient Per Angular Deg | 0.470 INCH-OUNCES NOMINAL IN |
| Rotor Input Electrical Power Rating | 5.4 WATTS NOMINAL |
| Shaft Thread Length | 0.2500 INCHES NOMINAL SINGLE SHAFT IN |
| Mounting Surface to Terminal End Distance | 6.0500 INCHES NOMINAL IN |
| Frequency in Hertz | 60.0 NOMINAL |
| Terminal Location | FRONT |
| Rotor Input Voltage Rating in Volts | 115.0 NOMINAL |
| Shaft Length | 0.5000 INCHES NOMINAL SINGLE SHAFT IN |
| Body Material | STEEL CORROSION RESISTING |
| Shaft Thread Direction | RIGHT-HAND SINGLE SHAFT |
| Rotor Input Current Rating | 0.38 AMPERES NOMINAL |
| Terminal Type and Quantity | 5 WIRE LEAD |
| Shaft Thread Class | 2A SINGLE SHAFT A |
| 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 |
|---|---|
| 44989 PRIMARY | L3harris Technologies, Inc Div Space & Airborne Systems (USA) |
| Reference | Meaning |
|---|---|
| 5HGMK6M0D4A | 5/2 Secondary reference U.S. Government activity |
| 5HGMK6M0D4A | 5/9 Secondary reference Honeywell Intl Inc Defense Avionics Systems |
| 5HGMK6M0D3 | C/1 Advisory reference — outside the item-of-supply concept Lockheed Martin Corporation Div Rms - Mitchel Field |
| L221007 | C/1 Advisory reference — outside the item-of-supply concept Raytheon Company Dba Raytheon Co |
NSN 5990-00-503-2840 is a Synchro,transmitter, manufactured by L3harris Technologies, Inc Div Space & Airborne Systems, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-00-503-2840 has 1 manufacturer part number on file: 44989 (L3harris Technologies, Inc Div Space & Airborne Systems).
1 possible match (shared part number, not a government interchangeability claim): 7520-00-973-1062. Verify interchangeability with system specifications before substitution.
Key specifications for 44989: Shaft Type: ROUND, THREADED SINGLE SHAFT; Flange Diameter: 3.6250 INCHES NOMINAL IN; Shaft Diameter: 0.2500 INCHES NOMINAL SINGLE SHAFT IN; Torque Gradient Per Angular Deg: 0.470 INCH-OUNCES NOMINAL IN. 16 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.