The Synchro,transmitter, cataloged under National Stock Number 5990-00-018-8604, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Ultra Electronics Maritime Systems Inc Div Subsidiary of Ultra Electronics Holdings Limited. Government technical data includes 29 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5990-00-018-8604 |
| Primary Part Number | 617461 |
| Item Name | Synchro,transmitter |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | Ultra Electronics Maritime Systems Inc Div Subsidiary of Ultra Electronics Holdings Limited |
| Status | ACTIVE |
| Body Size | 11 |
| Shaft Type | ROUND, SLOTTED SINGLE SHAFT |
| Flange Diameter | 1.0620 INCHES MAXIMUM IN |
| Undercut Width | 0.0620 INCHES MINIMUM IN |
| Shaft Diameter | 0.1873 INCHES MAXIMUM SINGLE SHAFT IN |
| Rotor DC Resistance in Ohms | 19.00 NOMINAL |
| Undercut Diameter | 0.9750 INCHES NOMINAL IN |
| Length | 0.0620 INCHES NOMINAL SHOULDER IN |
| Fragility Factor | MODERATELY RUGGED |
| Body Style | STANDARD ROUND C |
| Shaft Radial Play Determining Weight | 4.0 OUNCES OZ |
| Flange Thickness | 0.0930 INCHES NOMINAL IN |
| Torque Gradient Per Angular Deg | 3500.0 MILLIMETER-MILLIGRAMS MINIMUM MM |
| Shaft Maximum Runout | 0.0010 INCHES IN |
| Rotor Input Electrical Power Rating | 800.0 MILLIWATTS MAXIMUM |
| Alignment Hole Bolt Circle Diameter | 0.8120 INCHES MINIMUM IN |
| Mounting Surface to Terminal End Distance | 1.6400 INCHES MAXIMUM IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Zro Resistance in Ohms | 29.00 NOMINAL |
| Zrs Resistance in Ohms | 43.00 NOMINAL |
| Terminal Location | REAR |
| Rotor Input Voltage Rating in Volts | 26.0 NOMINAL |
| Shaft End Play Determining Weight | 4.0 OUNCES OZ |
| Shaft Maximum Radial Play | 0.0008 INCHES IN |
| Schematic Diagram Designator | 1 Y-ROTOR, 1 STATOR |
| Alignment Hole Quantity | 4 |
| Shaft Length | 0.5000 INCHES NOMINAL SINGLE SHAFT IN |
| Body Material | ALUMINUM ALLOY |
| Pilot Diameter | 0.6250 INCHES MAXIMUM IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 617461 | Ultra Electronics Maritime Systems Inc Div Subsidiary of Ultra Electronics Holdings Limited (CAN) |
| 11TX-300-N-22A/10 | American Precision Industries, Inc Div Portescap Us (USA) |
| Reference | Meaning |
|---|---|
| SMC617461 | C/1 Advisory reference — outside the item-of-supply concept Ultra Electronics Maritime Systems Inc Div Subsidiary of Ultra Electronics Holdings Limited |
| SM-C-617461 | 3/2 Design control — primary reference U.S. Government activity |
| U-214778 | 5/2 Secondary reference U.S. Government activity |
NSN 5990-00-018-8604 is a Synchro,transmitter, manufactured by Ultra Electronics Maritime Systems Inc Div Subsidiary of Ultra Electronics Holdings Limited, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-00-018-8604 has 2 manufacturer part numbers on file: 617461 (Ultra Electronics Maritime Systems Inc Div Subsidiary of Ultra Electronics Holdings Limited), 11TX-300-N-22A/10 (American Precision Industries, Inc Div Portescap Us).
Key specifications for 617461: Body Size: 11; Shaft Type: ROUND, SLOTTED SINGLE SHAFT; Flange Diameter: 1.0620 INCHES MAXIMUM IN; Undercut Width: 0.0620 INCHES MINIMUM 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.
NSN 5990-00-018-8604 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.