The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-730-5903, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5340-00-730-5903 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| First Step Diameter | 0.5150 INCHES NOMINAL IN |
| End Diameter | 0.4100 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | 0499,TY 3,FSCM 36659 MFR REF SINGLE TREATMENT RESPONSE |
| Distance From End to First Step | 0.1000 INCHES NOMINAL IN |
| Design Type | SOLID |
| Material Document and Classification | MIL-S-6050,COMP 8630,COND F-4 MIL SPEC SINGLE MATERIAL RESPONSE |
| Surface Treatment | NICKEL |
| Material | STEEL COMP 8630 |
| 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 |
|---|---|
| 789311-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-00-730-5903 is a Seat,helical Compression Spring, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-00-730-5903: Overall Height: 0.2000 INCHES NOMINAL IN; First Step Diameter: 0.5150 INCHES NOMINAL IN; End Diameter: 0.4100 INCHES NOMINAL IN; Surface Treatment Document and Classification: 0499,TY 3,FSCM 36659 MFR REF SINGLE TREATMENT RESPONSE. 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.