The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-325-3908, 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14 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-325-3908 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| First Step Diameter | 0.6500 INCHES NOMINAL IN |
| End Diameter | 0.6100 INCHES NOMINAL IN |
| Third Step Diameter | 1.2100 INCHES NOMINAL IN |
| Second End Diameter | 1.2100 INCHES NOMINAL IN |
| Distance From End to First Step | 1.1800 INCHES NOMINAL IN |
| Second Step Length | 0.4000 INCHES NOMINAL IN |
| Material Document and Classification | MIL-S-16598 MIL SPEC SINGLE MATERIAL RESPONSE |
| Counterbore Length | 1.7800 INCHES NOMINAL IN |
| Second Step Diameter | 0.8090 INCHES NOMINAL IN |
| Second Counterbore Length | 0.4400 INCHES NOMINAL IN |
| Second Counterbore Diameter | 0.4385 INCHES NOMINAL IN |
| First Step Length | 0.3800 INCHES NOMINAL IN |
| Bore Diameter | 0.6800 INCHES NOMINAL IN |
| Material | STEEL UNS K93602 |
| 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 |
|---|---|
| 10117336 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 63492 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-00-325-3908 is a Seat,helical Compression Spring, classified under FSC 5340, Hardware, Commercial. Status: active.
2 possible matches (shared part number, not a government interchangeability claim): 3120-00-424-3418, 2815-01-160-3588. Verify interchangeability with system specifications before substitution.
Key specifications for 5340-00-325-3908: Overall Height: 1.9700 INCHES NOMINAL IN; First Step Diameter: 0.6500 INCHES NOMINAL IN; End Diameter: 0.6100 INCHES NOMINAL IN; Third Step Diameter: 1.2100 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.