The Support,spring,downlock,main, cataloged under National Stock Number 1620-01-152-0451, 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 6 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 1620-01-152-0451 |
| Primary Part Number | 74A410771-2003 |
| Item Name | Support,spring,downlock,main |
| 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-225/9,7075-T73; 3.680 IN. O/A LG; 0.700 IN. 01A DIA A |
| 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 |
|---|---|
| 74A410771-2003 | Nassau Tool Works, Inc (USA) |
| 74A410771-2003 | Safran Landing Systems Canada Inc. (CAN) |
| 74A410771-2003 | Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co (USA) |
| 74A410771-2003 PRIMARY | The Boeing Company Div Defense (USA) |
| 74A410771-2003 | Cm Manufacturing Inc Dba Cm Manufacturing Inc (USA) |
| 74A410771-2003 | Blair Industries Inc (USA) |
| Reference | Meaning |
|---|---|
| 10153745 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 74A410771-2003 | C/1 Advisory reference — outside the item-of-supply concept Israel Aerospace Industries Ltd.shl-Aero Assemblies Division |
| 74A410771-2003 | 5/2 Secondary reference U.S. Government activity |
| 74A410771-2003 | 5/9 Secondary reference Israel Aerospace Industries Ltd. Shl - Aero Assemblies Division |
| 74A410771-2003 | 5/9 Secondary reference Circor Aerospace, Inc. Dba Circor Aerospace Machining Center |
| 74A410771-2003 | 5/9 Secondary reference All Tools, Inc. Dba E2 Precision Products |
NSN 1620-01-152-0451 is a Support,spring,downlock,main, manufactured by The Boeing Company Div Defense, classified under FSC 1620, Aircraft Landing Gear Components. Status: active.
NSN 1620-01-152-0451 has 6 manufacturer part numbers on file: 74A410771-2003 (Nassau Tool Works, Inc), 74A410771-2003 (Safran Landing Systems Canada Inc.), 74A410771-2003 (Apex Manufacturing Company, Inc. Dba Apex Manufacturing Co), 74A410771-2003 (The Boeing Company Div Defense), 74A410771-2003 (Cm Manufacturing Inc Dba Cm Manufacturing Inc) and 1 more.
Key specifications for 74A410771-2003: General Characteristics Item Description: ALUMINUM ALLOY PER QQ-A-225/9,7075-T73; 3.680 IN. O/A LG; 0.700 IN. 01A DIA A; 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 1620-01-152-0451 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.