The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-026-6746, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-01-026-6746 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| First Step Diameter | 1.7800 INCHES NOMINAL IN |
| End Diameter | 1.2200 INCHES MINIMUM AND 1.2300 INCHES MAXIMUM IN |
| Second End Diameter | 1.5400 INCHES NOMINAL IN |
| Distance From End to First Step | 0.2000 INCHES NOMINAL IN |
| Design Type | SOLID |
| Style Designator | SEAT |
| Counterbore Length | 2.1500 INCHES NOMINAL IN |
| Counterbore Diameter | 1.2800 INCHES MINIMUM AND 1.2900 INCHES MAXIMUM IN |
| First Step Length | 0.1200 INCHES NOMINAL IN |
| Spherical Seat Top Radius | 0.0200 INCHES MINIMUM AND 0.0300 INCHES MAXIMUM IN |
| Bore Diameter | 0.6800 INCHES MINIMUM AND 0.6900 INCHES MAXIMUM IN |
| Material | ALUMINUM ALLOY |
| 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 |
|---|---|
| 66-9677-1 | 3/2 Design control — primary reference U.S. Government activity |
| 66-9677 | 5/2 Secondary reference U.S. Government activity |
NSN 5340-01-026-6746 is a Seat,helical Compression Spring, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-01-026-6746: Overall Height: 2.9300 INCHES MINIMUM AND 2.9700 INCHES MAXIMUM IN; First Step Diameter: 1.7800 INCHES NOMINAL IN; End Diameter: 1.2200 INCHES MINIMUM AND 1.2300 INCHES MAXIMUM IN; Second End Diameter: 1.5400 INCHES NOMINAL IN. 12 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.