The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-649-9447, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 14 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5340-00-649-9447 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| First Step Diameter | 0.9480 INCHES NOMINAL IN |
| End Diameter | 0.6500 INCHES NOMINAL IN |
| Distance From End to First Step | 0.1490 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Counterbore Length | 0.4062 INCHES NOMINAL IN |
| Second Step Diameter | 1.3730 INCHES NOMINAL IN |
| Counterbore Diameter | 0.5320 INCHES NOMINAL IN |
| Second Counterbore Length | 0.2220 INCHES NOMINAL IN |
| Second Counterbore Diameter | 0.6250 INCHES NOMINAL IN |
| First Step Length | 0.2400 INCHES NOMINAL IN |
| Chamfer Angle in Deg | 45.0 |
| Bore Diameter | 0.4390 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 |
| Reference | Meaning |
|---|---|
| 884814 | 5/9 Secondary reference Clark Equipment Co |
| B415I202 | 3/9 Design control — primary reference Teledyne Continental Motors Industrial Products Div Teledyne Industries Inc Sub of Teledyne Inc |
| 884814 | 5/2 Secondary reference U.S. Government activity |
NSN 5340-00-649-9447 is a Seat,helical Compression Spring, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-00-649-9447: Overall Height: 0.4980 INCHES NOMINAL IN; First Step Diameter: 0.9480 INCHES NOMINAL IN; End Diameter: 0.6500 INCHES NOMINAL IN; Distance From End to First Step: 0.1490 INCHES NOMINAL IN. 14 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.