The Piston Assembly,air, cataloged under National Stock Number 1620-01-528-5443, 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 2 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1620-01-528-5443 |
| Primary Part Number | 74A410854-1005 |
| Item Name | Piston Assembly,air |
| FSC / FSG | 1620 / 16 — Aircraft Landing Gear Components |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Overall Diameter | 4.500 INCHES NOMINAL IN |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL B — Remove Demilitarization Key Points |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 74A410854-1005 PRIMARY | The Boeing Company Div Defense (USA) |
NSN 1620-01-528-5443 is a Piston Assembly,air, manufactured by The Boeing Company Div Defense, classified under FSC 1620, Aircraft Landing Gear Components. Status: active.
NSN 1620-01-528-5443 has 1 manufacturer part number on file: 74A410854-1005 (The Boeing Company Div Defense).
Key specifications for 74A410854-1005: Overall Diameter: 4.500 INCHES NOMINAL IN; Overall Length: 22.120 INCHES NOMINAL IN; Part Name Assigned by Controlling Agency: (INAVY) PISTON ASSEMBLY; End Item Identification: FIGHTER SUPPORT AIRCRAFT (F/A-18). 2 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.
NSN 1620-01-528-5443 has DEMIL Code B. 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.