The Synchro Assembly, cataloged under National Stock Number 5990-01-221-4423, is classified within Federal Supply Class 5990 (Synchros and Resolvers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Raytheon E-Systems, Inc. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5990-01-221-4423 |
| Primary Part Number | 636-4134-002 |
| Item Name | Synchro Assembly |
| FSC / FSG | 5990 / 59 — Synchros and Resolvers |
| Manufacturer | Raytheon E-Systems, Inc |
| Status | ACTIVE |
| General Characteristics Item Description | CONSISTS OF TWO SYNCHOS MOUNTED ON TOP OF RECTANGULAR HOUSING THAT ECLOSES GEARING; CROSS/LEVEL AXIS UNIT; EACH SYNCHRO HAS PLUG AND CABLE WITH CONNECTOR; CABLE IS 27 IN. LG TO ONE SYNCHRO AND 17 IN. LG TO THE OTHER ONE IN |
| 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 |
|---|---|
| 636-4134-002 | Raytheon E-Systems, Inc (USA) |
| Reference | Meaning |
|---|---|
| 806732-2 | 5/2 Secondary reference U.S. Government activity |
| 636-4134-002 | 3/9 Design control — primary reference Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems |
NSN 5990-01-221-4423 is a Synchro Assembly, manufactured by Raytheon E-Systems, Inc, classified under FSC 5990, Synchros and Resolvers. Status: active.
NSN 5990-01-221-4423 has 1 manufacturer part number on file: 636-4134-002 (Raytheon E-Systems, Inc).
Key specifications for 636-4134-002: General Characteristics Item Description: CONSISTS OF TWO SYNCHOS MOUNTED ON TOP OF RECTANGULAR HOUSING THAT ECLOSES GEARING; CROSS/LEVEL AXIS UNIT; EACH SYNCHRO HAS PLUG AND CABLE WITH CONNECTOR; CABLE IS 27 IN. LG TO ONE SYNCHRO AND 17 IN. LG TO THE OTHER ONE IN. 1 specification is 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.