The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-656-4830, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 3 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 5340-00-656-4830 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| FSC Application Data | AIRCRAFT HYDRAULIC,VACUUM,DEICING SYSTEMS |
| Design Type | SOLID |
| Material | STEEL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 111M01515 | 3/2 Design control — primary reference U.S. Government activity |
| M1515 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-00-656-4830 is a Seat,helical Compression Spring, classified under FSC 5340, Hardware, Commercial. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 3040-01-393-5838. Verify interchangeability with system specifications before substitution.
Key specifications for 5340-00-656-4830: FSC Application Data: AIRCRAFT HYDRAULIC,VACUUM,DEICING SYSTEMS; Design Type: SOLID; Material: STEEL. 3 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.