The Synchro,transmitter, cataloged under National Stock Number 5990-00-239-3432, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is American Precision Industries, Inc Div Portescap Us. Government technical data includes 29 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-00-239-3432 |
| Primary Part Number | 8TX300B34A |
| Item Name | Synchro,transmitter |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | American Precision Industries, Inc Div Portescap Us |
| Status | ACTIVE |
| Body Size | 8 |
| Shaft Type | ROUND, SLOTTED BOTH SHAFTS |
| Flange Diameter | 0.7470 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN |
| Undercut Width | 0.0620 INCHES NOMINAL IN |
| Shaft Diameter | 0.0895 INCHES MINIMUM FRONT SHAFT IN |
| Shaft Diameter | 0.0900 INCHES MAXIMUM REAR SHAFT IN |
| Rotor DC Resistance in Ohms | 24.00 NOMINAL |
| Undercut Diameter | 0.6880 INCHES MINIMUM AND 0.6910 INCHES MAXIMUM IN |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | STANDARD ROUND A |
| Flange Thickness | 0.0620 INCHES NOMINAL IN |
| Rotor Input Electrical Power Rating | 930.0 MILLIWATTS NOMINAL |
| Phase Shift Angle in Deg | 9.500 INPUT TO OUTPUT NOMINAL |
| Mounting Surface to Terminal End Distance | 1.2410 INCHES MAXIMUM IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Zro Resistance in Ohms | 32.00 NOMINAL |
| Plus J Zso Reactance in Ohms | 26.20 NOMINAL |
| Zrs Resistance in Ohms | 55.00 NOMINAL |
| Terminal Location | REAR |
| Rotor Input Voltage Rating in Volts | 26.0 NOMINAL |
| Shaft Length | 0.6370 INCHES NOMINAL BOTH SHAFTS IN |
| Body Material | STEEL CORROSION RESISTING |
| Pilot Diameter | 0.4995 INCHES MINIMUM AND 0.5000 INCHES MAXIMUM IN |
| Maximum Total Null Voltage Output in Millivolts Per Volt | 30.00 |
| Shaft Slot Width | 0.0200 INCHES NOMINAL BOTH SHAFTS IN |
| Plus J Zro Reactance in Ohms | 150.00 NOMINAL |
| Transformation Ratio | 0.454 ROTOR TO STATOR NOMINAL |
| Pilot Length | 0.0430 INCHES NOMINAL IN |
| Zso Resistance in Ohms | 7.30 NOMINAL |
| 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 |
|---|---|
| 8TX300B34A PRIMARY | American Precision Industries, Inc Div Portescap Us (USA) |
| Reference | Meaning |
|---|---|
| CM41014083 | 3/2 Design control — primary reference U.S. Government activity |
| CGH8BQ1L434 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5990-00-239-3432 is a Synchro,transmitter, manufactured by American Precision Industries, Inc Div Portescap Us, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-00-239-3432 has 1 manufacturer part number on file: 8TX300B34A (American Precision Industries, Inc Div Portescap Us).
Key specifications for 8TX300B34A: Body Size: 8; Shaft Type: ROUND, SLOTTED BOTH SHAFTS; Flange Diameter: 0.7470 INCHES MINIMUM AND 0.7500 INCHES MAXIMUM IN; Undercut Width: 0.0620 INCHES NOMINAL IN. 29 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.