The Collar and Gear Assembly, cataloged under National Stock Number 1620-01-398-3984, is classified within Federal Supply Class 1620 (Aircraft Landing Gear Components) of the Aircraft Components and Accessories group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 1 specification, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1620-01-398-3984 |
| Primary Part Number | 74A450640-1007 |
| Item Name | Collar and Gear Assembly |
| FSC / FSG | 1620 / 16 — Aircraft Landing Gear Components |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Relationship to Similar Equipment | INTERCHANGEABLE WITH MCDONNELL DOUGLAS COLLAR AND GEAR ASSEMBLY P/N 74A450640-1003 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | F |
| Part Number | Manufacturer |
|---|---|
| 74A450640-1007 | Israel Aerospace Industries Ltd.shl-Aero Assemblies Division (ISR) |
| 74A450640-1007 PRIMARY | The Boeing Company Div Defense (USA) |
| 74A450640-1007 | Hdi Landing Gear Usa Inc (USA) |
| Reference | Meaning |
|---|---|
| 10153791 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
NSN 1620-01-398-3984 is a Collar and Gear Assembly, manufactured by The Boeing Company Div Defense, classified under FSC 1620, Aircraft Landing Gear Components. Status: active.
NSN 1620-01-398-3984 has 3 manufacturer part numbers on file: 74A450640-1007 (Israel Aerospace Industries Ltd.shl-Aero Assemblies Division), 74A450640-1007 (The Boeing Company Div Defense), 74A450640-1007 (Hdi Landing Gear Usa Inc).
Key specifications for 74A450640-1007: Relationship to Similar Equipment: INTERCHANGEABLE WITH MCDONNELL DOUGLAS COLLAR AND GEAR ASSEMBLY P/N 74A450640-1003; End Item Identification: F/A-18 AIRCRAFT. 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 1620-01-398-3984 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.