The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-350-0859, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Boeing Distribution Services X, Inc.. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-350-0859 |
| Primary Part Number | S9404-98 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Boeing Distribution Services X, Inc. |
| Status | ACTIVE |
| First Step Diameter | 0.2980 INCHES MINIMUM AND 0.3030 INCHES MAXIMUM IN |
| End Diameter | 0.1500 INCHES MINIMUM AND 0.1550 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.0900 INCHES NOMINAL IN |
| Design Type | SOLID |
| Material Document and Classification | QQ-S-763,OR QQ-S-766,OR MIL-S-5059,300 SERIES EXCEPT CLASS 303 FED SPEC SINGLE MATERIAL RESPONSE |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| S9404-98 | Boeing Distribution Services X, Inc. (USA) |
| Reference | Meaning |
|---|---|
| S9404-98 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-350-0859 is a Seat,helical Compression Spring, manufactured by Boeing Distribution Services X, Inc., classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-350-0859 has 1 manufacturer part number on file: S9404-98 (Boeing Distribution Services X, Inc.).
Key specifications for S9404-98: Overall Height: 0.1450 INCHES MINIMUM AND 0.1550 INCHES MAXIMUM IN; First Step Diameter: 0.2980 INCHES MINIMUM AND 0.3030 INCHES MAXIMUM IN; End Diameter: 0.1500 INCHES MINIMUM AND 0.1550 INCHES MAXIMUM IN; Distance From End to First Step: 0.0900 INCHES NOMINAL IN. 6 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.