The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-318-3405, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-318-3405 |
| Primary Part Number | 2480554 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| Status | ACTIVE |
| End Diameter | 0.8070 INCHES MINIMUM AND 0.8080 INCHES MAXIMUM IN |
| Surface Treatment Document and Classification | MIL-L-46010 MIL SPEC SINGLE TREATMENT RESPONSE |
| Distance From End to First Step | 1.5290 INCHES NOMINAL IN |
| Design Type | SOLID |
| Material Document and Classification | MIL-S-81591,IC-347 MIL SPEC SINGLE MATERIAL RESPONSE |
| Surface Treatment | LUBRICANT DRY FILM |
| Bore Diameter | 0.6250 INCHES MINIMUM AND 0.6260 INCHES MAXIMUM IN |
| Material | STEEL UNS J92640 |
| 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 |
|---|---|
| 2480554 PRIMARY | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| Reference | Meaning |
|---|---|
| 5340PL0890687 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5340-01-318-3405 is a Seat,helical Compression Spring, manufactured by Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-318-3405 has 1 manufacturer part number on file: 2480554 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier).
Key specifications for 2480554: Overall Height: 1.1160 INCHES NOMINAL IN; End Diameter: 0.8070 INCHES MINIMUM AND 0.8080 INCHES MAXIMUM IN; Surface Treatment Document and Classification: MIL-L-46010 MIL SPEC SINGLE TREATMENT RESPONSE; Distance From End to First Step: 1.5290 INCHES NOMINAL IN. 8 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.