The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-120-4901, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 11 specifications, 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-120-4901 |
| Primary Part Number | 74A411513-2003 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Ridge Height | 0.1750 INCHES NOMINAL IN |
| FSC Application Data | ACFT LANDING GEAR |
| First Step Diameter | 1.5600 INCHES NOMINAL IN |
| End Diameter | 0.6250 INCHES NOMINAL IN |
| Distance From End to First Step | 0.2250 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Material Document and Classification | QQ-A-225/9, ALLOY 7075, T7351 FED SPEC SINGLE MATERIAL RESPONSE |
| Distance From Center to Beginning of Ridge | 0.7200 INCHES NOMINAL IN |
| Bore Diameter | 0.3750 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY 7075 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 74A411513-2003 PRIMARY | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10112396 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 74A411513-2003 | C/1 Advisory reference — outside the item-of-supply concept Kmi, Inc Dba Kmi Inc |
| 74A411513-2003 | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 74A411513-2003 | C/1 Advisory reference — outside the item-of-supply concept Goodrich Corporation Div Advanced Structures Landing Systems |
| 74A411513-2003 | C/1 Advisory reference — outside the item-of-supply concept Harlow Aerostructures, Llc |
NSN 5340-01-120-4901 is a Seat,helical Compression Spring, manufactured by The Boeing Company Div Defense, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-120-4901 has 1 manufacturer part number on file: 74A411513-2003 (The Boeing Company Div Defense).
1 possible match (shared part number, not a government interchangeability claim): 5905-01-123-6015. Verify interchangeability with system specifications before substitution.
Key specifications for 74A411513-2003: Ridge Height: 0.1750 INCHES NOMINAL IN; Overall Height: 0.3000 INCHES NOMINAL IN; FSC Application Data: ACFT LANDING GEAR; First Step Diameter: 1.5600 INCHES NOMINAL IN. 11 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
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.