The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-779-5739, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Eaton Aerospace, Llc Dba Jackson South. Government technical data includes 9 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-779-5739 |
| Primary Part Number | 604449 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Eaton Aerospace, Llc Dba Jackson South |
| Status | ACTIVE |
| First Step Diameter | 0.6190 INCHES MINIMUM AND 0.6240 INCHES MAXIMUM IN |
| End Diameter | 0.5470 INCHES MINIMUM AND 0.5490 INCHES MAXIMUM IN |
| Distance From End to First Step | 0.0650 INCHES MINIMUM AND 0.0700 INCHES MAXIMUM IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Counterbore Length | 0.1900 INCHES MINIMUM AND 0.1950 INCHES MAXIMUM IN |
| Counterbore Diameter | 0.4980 INCHES MINIMUM AND 0.5020 INCHES MAXIMUM IN |
| Bore Diameter | 0.3700 INCHES MINIMUM AND 0.3800 INCHES MAXIMUM 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 |
| Part Number | Manufacturer |
|---|---|
| 604449 PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
NSN 5340-00-779-5739 is a Seat,helical Compression Spring, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-779-5739 has 1 manufacturer part number on file: 604449 (Eaton Aerospace, Llc Dba Jackson South).
Key specifications for 604449: Overall Height: 0.2900 INCHES NOMINAL IN; First Step Diameter: 0.6190 INCHES MINIMUM AND 0.6240 INCHES MAXIMUM IN; End Diameter: 0.5470 INCHES MINIMUM AND 0.5490 INCHES MAXIMUM IN; Distance From End to First Step: 0.0650 INCHES MINIMUM AND 0.0700 INCHES MAXIMUM 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.