The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-013-3638, 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 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-013-3638 |
| Primary Part Number | 4926-21 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Eaton Aerospace, Llc Dba Jackson South |
| Status | ACTIVE |
| First Step Diameter | 0.6600 INCHES NOMINAL IN |
| Material Hardness Rating | 58.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM |
| End Diameter | 0.4400 INCHES NOMINAL IN |
| Distance From End to First Step | 0.1400 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Bore Diameter | 0.3040 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 |
| Part Number | Manufacturer |
|---|---|
| 4926-21 PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
| Reference | Meaning |
|---|---|
| 4926-21 | 3/9 Design control — primary reference U.S. Government activity |
NSN 5340-00-013-3638 is a Seat,helical Compression Spring, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-013-3638 has 1 manufacturer part number on file: 4926-21 (Eaton Aerospace, Llc Dba Jackson South).
Key specifications for 4926-21: Overall Height: 0.2400 INCHES NOMINAL IN; First Step Diameter: 0.6600 INCHES NOMINAL IN; Material Hardness Rating: 58.0 ROCKWELL C MINIMUM AND 60.0 ROCKWELL C MAXIMUM; End Diameter: 0.4400 INCHES NOMINAL IN. 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.