The Selector Set,sleeve, cataloged under National Stock Number 1650-00-657-5604, is classified within Federal Supply Class 1650 (Aircraft Hydraulic, Vacuum, and De-icing System Components) of the Aircraft Components and Accessories group. The manufacturer of record is Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-00-657-5604 |
| Primary Part Number | 5551944-13 |
| Item Name | Selector Set,sleeve |
| FSC / FSG | 1650 / 16 — Aircraft Hydraulic, Vacuum, and De-icing System Components |
| Manufacturer | Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company |
| Status | ACTIVE |
| General Characteristics Item Description | CONSISTS OF P/N 4551957 SLIDE 1 AND P/N 3551958 SLEEVE 1 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5551944-13 PRIMARY | Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company (USA) |
| 5551944-13 | United Aeronautical Corporation Dba United Aeronautical Corp (USA) |
| Reference | Meaning |
|---|---|
| 5551944-13 | 5/9 Secondary reference Consolidated Aeronautics Corp |
| 5551944-13 | 5/2 Secondary reference U.S. Government activity |
| 5551944 | D/9 Drawing number reference only U.S. Government activity |
| 5551944-13 | 5/9 Secondary reference The Boeing Company |
| 5551944-13 | 5/9 Secondary reference The Boeing Company Div Defense |
NSN 1650-00-657-5604 is a Selector Set,sleeve, manufactured by Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company, classified under FSC 1650, Aircraft Hydraulic, Vacuum, and De-icing System Components. Status: active.
NSN 1650-00-657-5604 has 2 manufacturer part numbers on file: 5551944-13 (Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company), 5551944-13 (United Aeronautical Corporation Dba United Aeronautical Corp).
Key specifications for 5551944-13: General Characteristics Item Description: CONSISTS OF P/N 4551957 SLIDE 1 AND P/N 3551958 SLEEVE 1; End Item Identification: DOUGLAS AIRCRAFT ELEVATOR TANDEM,NO. 5551944. 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.
NSN 1650-00-657-5604 has DEMIL Code Q. 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.