The Link,switch,downlock, cataloged under National Stock Number 1620-00-189-2117, is classified within Federal Supply Class 1620 (Aircraft Landing Gear Components) of the Aircraft Components and Accessories group. The manufacturer of record is Smith and Smith Aircraft Co. Government technical data includes 1 specification, 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1620-00-189-2117 |
| Primary Part Number | 159-33139-10 |
| Item Name | Link,switch,downlock |
| FSC / FSG | 1620 / 16 — Aircraft Landing Gear Components |
| Manufacturer | Smith and Smith Aircraft Co |
| Status | ACTIVE |
| General Characteristics Item Description | STEEL,3.000 IN. LG,0.562 IN. W,1.311 IN. H IN |
| 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 |
|---|---|
| 159-33139-10 PRIMARY | Smith and Smith Aircraft Co (USA) |
| Reference | Meaning |
|---|---|
| 159-33139-10 | 5/9 Secondary reference U.S. Government activity |
NSN 1620-00-189-2117 is a Link,switch,downlock, manufactured by Smith and Smith Aircraft Co, classified under FSC 1620, Aircraft Landing Gear Components. Status: active.
NSN 1620-00-189-2117 has 1 manufacturer part number on file: 159-33139-10 (Smith and Smith Aircraft Co).
Key specifications for 159-33139-10: General Characteristics Item Description: STEEL,3.000 IN. LG,0.562 IN. W,1.311 IN. H IN. 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 1620-00-189-2117 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.