The Switch Assembly,wired, cataloged under National Stock Number 1620-01-025-8500, is classified within Federal Supply Class 1620 (Aircraft Landing Gear Components) of the Aircraft Components and Accessories group. The manufacturer of record is Grace Aerospace Llc Div Jacksonville. The record lists 4 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 1620-01-025-8500 |
| Primary Part Number | 972539-103 |
| Item Name | Switch Assembly,wired |
| FSC / FSG | 1620 / 16 — Aircraft Landing Gear Components |
| Manufacturer | Grace Aerospace Llc Div Jacksonville |
| 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 | X |
| Part Number | Manufacturer |
|---|---|
| 972539-103 | Grace Aerospace Llc (USA) |
| 972539-103 PRIMARY | Grace Aerospace Llc Div Jacksonville (USA) |
| 972539-103 | Thomas Instrument, Incorporated (USA) |
| 972539-103 | Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc (USA) |
| Reference | Meaning |
|---|---|
| 972539-103 | 3/2 Design control — primary reference U.S. Government activity |
| 972539-107 | 5/9 Secondary reference Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc |
| 972539-107 | 5/9 Secondary reference U.S. Government activity |
| 962721-101 | 5/9 Secondary reference U.S. Government activity |
NSN 1620-01-025-8500 is a Switch Assembly,wired, manufactured by Grace Aerospace Llc Div Jacksonville, classified under FSC 1620, Aircraft Landing Gear Components. Status: active.
NSN 1620-01-025-8500 has 4 manufacturer part numbers on file: 972539-103 (Grace Aerospace Llc), 972539-103 (Grace Aerospace Llc Div Jacksonville), 972539-103 (Thomas Instrument, Incorporated), 972539-103 (Lockheed Martin Aeroparts, Inc. Dba Lockheed Martin Aeroparts Inc).
Key specifications for 972539-103: End Item Identification: AIRCRAFT MODEL EP-3E. 0 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 1620-01-025-8500 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.