The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-103-9507, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company. Government technical data includes 9 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-103-9507 |
| Primary Part Number | 114S2971-25 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | The Boeing Company |
| Status | ACTIVE |
| FSC Application Data | FUSELAGE SECT.,ACFT |
| First Step Diameter | 2.8750 INCHES NOMINAL IN |
| Material Hardness Rating | 33.0 ROCKWELL C MAXIMUM |
| End Diameter | 2.2200 INCHES NOMINAL IN |
| Distance From End to First Step | 0.2500 INCHES NOMINAL IN |
| Design Type | SOLID |
| Material Document and Classification | MIL-S-5000, COMP 4340 MIL SPEC SINGLE MATERIAL RESPONSE |
| First Step Length | 0.0800 INCHES NOMINAL IN |
| Material | STEEL COMP 4340 |
| 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 |
|---|---|
| 114S2979-1 | The Boeing Company (USA) |
| 114S2971-25 PRIMARY | The Boeing Company (USA) |
NSN 5340-00-103-9507 is a Seat,helical Compression Spring, manufactured by The Boeing Company, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-103-9507 has 2 manufacturer part numbers on file: 114S2979-1 (The Boeing Company), 114S2971-25 (The Boeing Company).
Key specifications for 114S2971-25: Overall Height: 0.9500 INCHES NOMINAL IN; FSC Application Data: FUSELAGE SECT.,ACFT; First Step Diameter: 2.8750 INCHES NOMINAL IN; Material Hardness Rating: 33.0 ROCKWELL C MAXIMUM. 9 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.