The Cap Assembly,housing, cataloged under National Stock Number 1620-01-186-1592, is classified within Federal Supply Class 1620 (Aircraft Landing Gear Components) of the Aircraft Components and Accessories group. The manufacturer of record is The Boeing Company Div Defense. 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through both NSN and commercial part number lookups. 7 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1620-01-186-1592 |
| Primary Part Number | 74A450978-1008 |
| Item Name | Cap Assembly,housing |
| FSC / FSG | 1620 / 16 — Aircraft Landing Gear Components |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| General Characteristics Item Description | ALUMINUM ALLOY PER QQ-A-367; 5.500 IN. DIA; 1.120 IN. THK IN |
| 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 |
|---|---|
| 520450978-1008 | Israel Aerospace Industries Ltd.shl-Aero Assemblies Division (ISR) |
| 74A450978-1008 PRIMARY | The Boeing Company Div Defense (USA) |
| 74A450978-1008 | Circor Aerospace, Inc. Div Circor (USA) |
| Reference | Meaning |
|---|---|
| 74A450978-1008 | 5/9 Secondary reference Safran Landing Systems Canada Inc. |
| 74A450978-1008 | 5/9 Secondary reference Circor Aerospace, Inc. Dba Circor Aerospace Machining Center |
| 10153764 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 520450978-1008 | 5/9 Secondary reference Israel Aerospace Industries Ltd. Shl - Aero Assemblies Division |
| 74A450978-1008 | 5/9 Secondary reference All Tools, Inc. Dba E2 Precision Products |
| 74A450978-1008 | 5/9 Secondary reference Nassau Tool Works, Inc |
| 74A450978-1008 | 5/9 Secondary reference Heroux-Devtek Inc |
NSN 1620-01-186-1592 is a Cap Assembly,housing, manufactured by The Boeing Company Div Defense, classified under FSC 1620, Aircraft Landing Gear Components. Status: active.
NSN 1620-01-186-1592 has 3 manufacturer part numbers on file: 520450978-1008 (Israel Aerospace Industries Ltd.shl-Aero Assemblies Division), 74A450978-1008 (The Boeing Company Div Defense), 74A450978-1008 (Circor Aerospace, Inc. Div Circor).
Key specifications for 74A450978-1008: General Characteristics Item Description: ALUMINUM ALLOY PER QQ-A-367; 5.500 IN. DIA; 1.120 IN. THK IN; End Item Identification: AIRCRAFT MODEL F-18. 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 1620-01-186-1592 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.