The Seat,helical Compression Spring, cataloged under National Stock Number 5340-01-156-5294, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 6 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-156-5294 |
| Primary Part Number | 518-4674792 ITEM 6 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| First Step Diameter | 2.0300 INCHES NOMINAL IN |
| End Diameter | 1.2700 INCHES NOMINAL IN |
| Seat Angle in Deg | 30.0 |
| Design Type | SOLID |
| Material Document and Classification | QQ-C-465,ALLOY 642 FED SPEC SINGLE MATERIAL RESPONSE |
| Material | COPPER ALLOY 642 |
| 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 |
|---|---|
| 518-4674792 ITEM 6 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 518-4674792 ITE | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
NSN 5340-01-156-5294 is a Seat,helical Compression Spring, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-156-5294 has 1 manufacturer part number on file: 518-4674792 ITEM 6 (Naval Sea Systems Command).
Key specifications for 518-4674792 ITEM 6: Overall Height: 0.3750 INCHES NOMINAL IN; First Step Diameter: 2.0300 INCHES NOMINAL IN; End Diameter: 1.2700 INCHES NOMINAL IN; Seat Angle in Deg: 30.0. 6 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.