The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-411-3786, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-411-3786 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| First Step Diameter | 0.5980 INCHES NOMINAL IN |
| End Diameter | 0.2188 INCHES NOMINAL IN |
| Second End Diameter | 0.2812 INCHES NOMINAL IN |
| Distance From End to First Step | 0.5000 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| First Step Length | 0.1740 INCHES NOMINAL IN |
| Bore Diameter | 0.0938 INCHES NOMINAL IN |
| 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 |
| Unit of Issue | EA |
| Reference | Meaning |
|---|---|
| GU7818 | 5/9 Secondary reference Haynes Corporation |
| GU7818 | 5/9 Secondary reference Ambac International Corporation Div Ambac International |
| A001-750 | 3/9 Design control — primary reference Cooper Cameron Corp Ajax-Superior Div |
NSN 5340-00-411-3786 is a Seat,helical Compression Spring, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-00-411-3786: Overall Height: 0.8330 INCHES NOMINAL IN; First Step Diameter: 0.5980 INCHES NOMINAL IN; End Diameter: 0.2188 INCHES NOMINAL IN; Second End Diameter: 0.2812 INCHES NOMINAL IN. 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.