The Arm Assembly,valve, cataloged under National Stock Number 1650-00-657-5240, 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1650-00-657-5240 |
| Primary Part Number | 4673992 |
| Item Name | Arm Assembly,valve |
| 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 | ALUMINUM ALLOY,CONSIST OF ARM 1EA AND 1EA BEARING |
| 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 |
|---|---|
| 4673992 | Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company (USA) |
| 4673992 | Kitco Llc (USA) |
| Reference | Meaning |
|---|---|
| 4673992 | 3/2 Design control — primary reference U.S. Government activity |
| 4673992 | 5/9 Secondary reference The Boeing Company |
NSN 1650-00-657-5240 is a Arm Assembly,valve, 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 1650-00-657-5240 has 2 manufacturer part numbers on file: 4673992 (Derco Aerospace, Inc. Dba Derco Aerospace, Inc. a Lockheed Martin Company), 4673992 (Kitco Llc).
Key specifications for 4673992: General Characteristics Item Description: ALUMINUM ALLOY,CONSIST OF ARM 1EA AND 1EA BEARING. 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 1650-00-657-5240 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.