The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-187-8415, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Legacy Am&m. Government technical data includes 12 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-187-8415 |
| Primary Part Number | L5875054-003 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | The Boeing Company Div Legacy Am&m |
| Status | ACTIVE |
| FSC Application Data | AIRCRAFT HYDRAULIC SYSTEMS |
| First Step Diameter | 0.3300 INCHES NOMINAL IN |
| End Diameter | 0.3100 INCHES NOMINAL IN |
| Distance From End to First Step | 0.3750 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Counterbore Length | 0.0720 INCHES NOMINAL IN |
| Second Step Diameter | 0.9230 INCHES NOMINAL IN |
| Counterbore Diameter | 0.4990 INCHES NOMINAL IN |
| First Step Length | 0.0950 INCHES NOMINAL IN |
| Bore Diameter | 0.2500 INCHES NOMINAL IN |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| L5875054-003 PRIMARY | The Boeing Company Div Legacy Am&m (USA) |
| Reference | Meaning |
|---|---|
| L5875054-003 | 5/2 Secondary reference U.S. Government activity |
| L5875054-003 | 5/2 Secondary reference U.S. Government activity |
NSN 5340-01-187-8415 is a Seat,helical Compression Spring, manufactured by The Boeing Company Div Legacy Am&m, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-187-8415 has 1 manufacturer part number on file: L5875054-003 (The Boeing Company Div Legacy Am&m).
Key specifications for L5875054-003: Overall Height: 0.5950 INCHES NOMINAL IN; FSC Application Data: AIRCRAFT HYDRAULIC SYSTEMS; First Step Diameter: 0.3300 INCHES NOMINAL IN; End Diameter: 0.3100 INCHES NOMINAL IN. 12 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.