The Lock Link Assembly, cataloged under National Stock Number 1620-00-004-9872, is classified within Federal Supply Class 1620 (Aircraft Landing Gear Components) of the Aircraft Components and Accessories group. The manufacturer of record is Ontic Engineering & Manufacturing, Inc Dba Ontic Us. 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1620-00-004-9872 |
| Primary Part Number | 2578099 |
| Item Name | Lock Link Assembly |
| FSC / FSG | 1620 / 16 — Aircraft Landing Gear Components |
| Manufacturer | Ontic Engineering & Manufacturing, Inc Dba Ontic Us |
| Status | ACTIVE |
| Criticality Code Justification | FEAT |
| 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 |
|---|---|
| 2578099 PRIMARY | Ontic Engineering & Manufacturing, Inc Dba Ontic Us (USA) |
| 2578099 | Northrop Grumman Systems Corporation (USA) |
| 2578099 | Northrop Grumman Systems Corporation Div Northrop Grumman Aeronautics Systems (USA) |
| Reference | Meaning |
|---|---|
| 2578099 | 5/9 Secondary reference Honeywell International Inc. Dba Honeywell Div Aerospace-South Bend (westmoor St) |
| 2578099 | 5/9 Secondary reference Goodrich Corporation Div Advanced Structures Landing Systems |
| 2578099 | 5/9 Secondary reference Goodrich Corp Dba Goodrich Corp |
NSN 1620-00-004-9872 is a Lock Link Assembly, manufactured by Ontic Engineering & Manufacturing, Inc Dba Ontic Us, classified under FSC 1620, Aircraft Landing Gear Components. Status: active.
NSN 1620-00-004-9872 has 3 manufacturer part numbers on file: 2578099 (Ontic Engineering & Manufacturing, Inc Dba Ontic Us), 2578099 (Northrop Grumman Systems Corporation), 2578099 (Northrop Grumman Systems Corporation Div Northrop Grumman Aeronautics Systems).
Key specifications for 2578099: Criticality Code Justification: FEAT; Special Features: CRITICAL SAFETY ITEM (CSI); Part Name Assigned by Controlling Agency: LOCK LINK ASSEMBLY. 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 1620-00-004-9872 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.