The Synchro,control Transformer, cataloged under National Stock Number 5990-00-649-8352, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Us Army Aviation and Missile Command. Government technical data includes 24 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-00-649-8352 |
| Primary Part Number | 9091809 |
| Item Name | Synchro,control Transformer |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | Us Army Aviation and Missile Command |
| Status | ACTIVE |
| Body Size | 23 |
| Shaft Type | ROUND, THREADED SINGLE SHAFT |
| Body Diameter | 1.9985 INCHES MAXIMUM IN |
| Flange Diameter | 2.2495 INCHES NOMINAL IN |
| Shaft Diameter | 0.2454 INCHES NOMINAL SINGLE SHAFT IN |
| Length | 0.7060 INCHES NOMINAL SHOULDER IN |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | STANDARD ROUND D |
| Flange Thickness | 0.4175 INCHES NOMINAL IN |
| Shaft Thread Length | 0.3895 INCHES NOMINAL SINGLE SHAFT IN |
| Aft of First Flange Diameter | 1.9990 INCHES NOMINAL IN |
| Terminal Location | REAR |
| Shaft Length | 0.6600 INCHES NOMINAL SINGLE SHAFT IN |
| Pilot Diameter | 0.6000 INCHES MAXIMUM IN |
| Second Shoulder Length | 0.4210 INCHES NOMINAL IN |
| Shoulder Diameter | 1.9875 INCHES NOMINAL IN |
| Shaft Nominal Thread Size | 0.250 INCHES SINGLE SHAFT IN |
| Shaft Thread Direction | RIGHT-HAND SINGLE SHAFT |
| Pilot Length | 0.0460 INCHES NOMINAL IN |
| Shaft Thread Series Designator | UNF SINGLE SHAFT |
| Material | STEEL CORROSION RESISTING BODY |
| Terminal Type and Quantity | 1 CONNECTOR, PLUG |
| Second Shoulder Diameter | 1.9990 INCHES NOMINAL IN |
| 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 |
|---|---|
| CT23-4G | General Dynamics Motion Control Llc (USA) |
| 23CT1382 | Ametek Technical & Industrial Products, Inc. Dba Tachtronic Instruments Division Div Ametek Technical and Industrial Products, Inc. (USA) |
| 9091809 PRIMARY | Us Army Aviation and Missile Command (USA) |
| Reference | Meaning |
|---|---|
| N21809 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems |
| VCT23/48-4G | 5/9 Secondary reference General Dynamics Motion Control Llc |
NSN 5990-00-649-8352 is a Synchro,control Transformer, manufactured by Us Army Aviation and Missile Command, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-00-649-8352 has 3 manufacturer part numbers on file: CT23-4G (General Dynamics Motion Control Llc), 23CT1382 (Ametek Technical & Industrial Products, Inc. Dba Tachtronic Instruments Division Div Ametek Technical and Industrial Products, Inc.), 9091809 (Us Army Aviation and Missile Command).
Key specifications for 9091809: Body Size: 23; Shaft Type: ROUND, THREADED SINGLE SHAFT; Body Diameter: 1.9985 INCHES MAXIMUM IN; Flange Diameter: 2.2495 INCHES NOMINAL IN. 24 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.