The Uplock Assembly,door,aircraft, cataloged under National Stock Number 1680-01-512-6540, is classified within Federal Supply Class 1680 (Miscellaneous Aircraft Accessories and Components) of the Aircraft Components and Accessories group. The manufacturer of record is Marathonnorco Aerospace, Inc.. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1680-01-512-6540 |
| Primary Part Number | A3503-134 |
| Item Name | Uplock Assembly,door,aircraft |
| FSC / FSG | 1680 / 16 — Miscellaneous Aircraft Accessories and Components |
| Manufacturer | Marathonnorco Aerospace, Inc. |
| Status | ACTIVE |
| Criticality Code Justification | AGAV |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Part Number | Manufacturer |
|---|---|
| 74B348001-134 | The Boeing Company Div Defense (USA) |
| 74B348001-134 | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| A3503-134 PRIMARY | Marathonnorco Aerospace, Inc. (USA) |
NSN 1680-01-512-6540 is a Uplock Assembly,door,aircraft, manufactured by Marathonnorco Aerospace, Inc., classified under FSC 1680, Miscellaneous Aircraft Accessories and Components. Status: active.
NSN 1680-01-512-6540 has 3 manufacturer part numbers on file: 74B348001-134 (The Boeing Company Div Defense), 74B348001-134 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), A3503-134 (Marathonnorco Aerospace, Inc.).
Key specifications for A3503-134: Criticality Code Justification: AGAV; End Item Identification: FIGHTER AIRCRAFT-FIRST (F18 E/F). 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 1680-01-512-6540 has DEMIL Code D. 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.