The Wrench,piston Nut, cataloged under National Stock Number 4920-00-784-2017, is classified within Federal Supply Class 4920 (Aircraft Maintenance and Repair Shop Specialized Equipment) of the Maintenance and Repair Shop Equipment group. The manufacturer of record is Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc. The record lists 2 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Item Name | Wrench,piston Nut |
| FSC / FSG | 4920 — Aircraft Maintenance and Repair Shop Specialized Equipment (FSG 49) |
| Manufacturers | Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc (CAGE 0A489); A and M Aerospace, Inc. (CAGE 6Z800) |
| Parameter | Value |
|---|---|
| NSN | 4920-00-784-2017 |
| Primary Part Number | 404053-1 |
| Item Name | Wrench,piston Nut |
| FSC / FSG | 4920 / 49 — Aircraft Maintenance and Repair Shop Specialized Equipment |
| Manufacturer | Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
NSN 4920-00-784-2017 is a Wrench,piston Nut, manufactured by Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc, classified under FSC 4920, Aircraft Maintenance and Repair Shop Specialized Equipment. Status: active.
NSN 4920-00-784-2017 has 2 manufacturer part numbers on file: 404053-1 (Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc), 404053-1 (A and M Aerospace, Inc.).
1 possible match (shared part number, not a government interchangeability claim): 5945-00-812-7814. Verify interchangeability with system specifications before substitution.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
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.