The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-318-3404, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-318-3404 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| First Step Diameter | 0.9930 INCHES MINIMUM AND 0.9950 INCHES MAXIMUM IN |
| End Diameter | 0.6250 INCHES NOMINAL IN |
| Surface Treatment Document and Classification | DOD-P-16232,TY M,CL 2 DEF STAN/SPEC SINGLE TREATMENT RESPONSE |
| Distance From End to First Step | 0.3620 INCHES NOMINAL IN |
| Design Type | SOLID |
| Material Document and Classification | ASTM A108, GRADE 1020 ASSN STD SINGLE MATERIAL RESPONSE |
| Counterbore Diameter | 0.6250 INCHES MINIMUM AND 0.6270 INCHES MAXIMUM IN |
| Surface Treatment | PHOSPHATE MANGANESE |
| Bore Diameter | 0.4370 INCHES MINIMUM AND 0.4371 INCHES MAXIMUM IN |
| Material | STEEL COMP 1020 |
| 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 |
|---|---|
| 2146263 | C/1 Advisory reference — outside the item-of-supply concept Zf Industrieantriebe Witten Gmbh |
| 2146263 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
| 5340PL0892505 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5340-01-318-3404 is a Seat,helical Compression Spring, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-01-318-3404: Overall Height: 1.4370 INCHES NOMINAL IN; First Step Diameter: 0.9930 INCHES MINIMUM AND 0.9950 INCHES MAXIMUM IN; End Diameter: 0.6250 INCHES NOMINAL IN; Surface Treatment Document and Classification: DOD-P-16232,TY M,CL 2 DEF STAN/SPEC SINGLE TREATMENT RESPONSE. 10 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.