The Piston Assembly, cataloged under National Stock Number 1620-00-004-9840, is classified within Federal Supply Class 1620 (Aircraft Landing Gear Components) of the Aircraft Components and Accessories group. The manufacturer of record is Aar Supply Chain, Inc Dba Aar Defense Systems & Logistics. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Item Name | Piston Assembly |
| FSC / FSG | 1620 — Aircraft Landing Gear Components (FSG 16) |
| Manufacturers | Aar Supply Chain, Inc Dba Aar Defense Systems & Logistics (CAGE 1Y249); Northrop Grumman Systems Corporation Div Northrop Grumman Aeronautics Systems (CAGE 70974); Northrop Grumman Systems Corporation (CAGE 79RG9) |
| Parameter | Value |
|---|---|
| NSN | 1620-00-004-9840 |
| Primary Part Number | 2579035 *AUTH DIST* |
| Item Name | Piston Assembly |
| FSC / FSG | 1620 / 16 — Aircraft Landing Gear Components |
| Manufacturer | Aar Supply Chain, Inc Dba Aar Defense Systems & Logistics |
| Status | ACTIVE |
| 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 |
|---|---|
| 2579035 *AUTH DIST* PRIMARY | Aar Supply Chain, Inc Dba Aar Defense Systems & Logistics (USA) |
| 2579035 PRIMARY | Northrop Grumman Systems Corporation Div Northrop Grumman Aeronautics Systems (USA) |
| 2579035 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 2579035 | 5/9 Secondary reference Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St) |
| 2579035 | 5/9 Secondary reference Goodrich Corporation Div Advanced Structures Landing Systems |
| 2579035 | 5/9 Secondary reference Goodrich Corp Dba Goodrich Corp |
| 2579035 | C/1 Advisory reference — outside the item-of-supply concept Goodrich Corporation |
NSN 1620-00-004-9840 is a Piston Assembly, manufactured by Aar Supply Chain, Inc Dba Aar Defense Systems & Logistics, classified under FSC 1620, Aircraft Landing Gear Components. Status: active.
NSN 1620-00-004-9840 has 3 manufacturer part numbers on file: 2579035 *AUTH DIST* (Aar Supply Chain, Inc Dba Aar Defense Systems & Logistics), 2579035 (Northrop Grumman Systems Corporation Div Northrop Grumman Aeronautics Systems), 2579035 (Northrop Grumman Systems Corporation).
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 1620-00-004-9840 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.