The Resolver,electrical, cataloged under National Stock Number 5990-01-437-4876, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Aar International Inc. 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5990-01-437-4876 |
| Primary Part Number | CSH8LBT09 |
| Item Name | Resolver,electrical |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | Aar International Inc |
| Status | ACTIVE |
| Body Size | 8 |
| Shaft Type | ROUND, SLOTTED SINGLE SHAFT |
| Flange Diameter | 0.7500 INCHES MAXIMUM IN |
| Undercut Width | 0.0670 INCHES MAXIMUM IN |
| Shaft Diameter | 0.1200 INCHES MAXIMUM SINGLE SHAFT IN |
| Rotor DC Resistance in Ohms | 278.00 NOMINAL |
| Undercut Diameter | 0.6910 INCHES MAXIMUM IN |
| Body Style | STANDARD ROUND A |
| Flange Thickness | 0.0670 INCHES MAXIMUM IN |
| Rotor Input Electrical Power Rating | 0.015 WATTS NOMINAL |
| Mounting Surface to Terminal End Distance | 1.2410 INCHES MAXIMUM IN |
| Frequency in Hertz | 400.0 NOMINAL |
| Zro Resistance in Ohms | 325.00 NOMINAL |
| Plus J Zso Reactance in Ohms | 1340.00 NOMINAL |
| Zrs Resistance in Ohms | 490.00 NOMINAL |
| Terminal Location | REAR |
| Rotor Input Voltage Rating in Volts | 11.8 NOMINAL |
| Shaft Length | 0.4120 INCHES MAXIMUM SINGLE SHAFT IN |
| Pilot Diameter | 0.5000 INCHES MAXIMUM IN |
| Shaft Slot Width | 0.0200 INCHES MAXIMUM SINGLE SHAFT IN |
| Plus J Zro Reactance in Ohms | 1715.00 NOMINAL |
| Transformation Ratio | 0.847 ROTOR TO STATOR NOMINAL |
| Pilot Length | 0.0480 INCHES MAXIMUM IN |
| Plus J Zss Reactance in Ohms | 116.00 NOMINAL |
| Zso Resistance in Ohms | 213.00 NOMINAL |
| Rotor Input Current Rating | 0.0068 AMPERES NOMINAL |
| Material | ALUMINUM ALLOY BODY |
| Terminal Type and Quantity | 7 WIRE LEAD |
| Maximum Temp Rise | 125.00 CELSIUS DEGC |
| 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 |
|---|---|
| CSH8LBT09 | Aar International Inc (FRA) |
| Reference | Meaning |
|---|---|
| CSH-8-LBT-09 | 3/9 Design control — primary reference Moog Inc. |
| CSH8LBT09 | 5/9 Secondary reference U.S. Government activity |
NSN 5990-01-437-4876 is a Resolver,electrical, manufactured by Aar International Inc, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-01-437-4876 has 1 manufacturer part number on file: CSH8LBT09 (Aar International Inc).
Key specifications for CSH8LBT09: Body Size: 8; Shaft Type: ROUND, SLOTTED SINGLE SHAFT; Flange Diameter: 0.7500 INCHES MAXIMUM IN; Undercut Width: 0.0670 INCHES MAXIMUM 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.