The Seat,helical Compression Spring, cataloged under National Stock Number 5340-00-700-2439, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp. Government technical data includes 9 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-00-700-2439 |
| Primary Part Number | S6165-61531-000 |
| Item Name | Seat,helical Compression Spring |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp |
| Status | ACTIVE |
| FSC Application Data | VERTICAL GYRO CONTROL |
| First Step Diameter | 1.0000 INCHES NOMINAL IN |
| End Diameter | 0.5800 INCHES NOMINAL IN |
| Second End Diameter | 0.6550 INCHES NOMINAL IN |
| Distance From End to First Step | 0.2390 INCHES NOMINAL IN |
| Design Type | SOLID |
| First Step Length | 0.0730 INCHES NOMINAL IN |
| Bore Diameter | 0.5000 INCHES NOMINAL 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 |
| Part Number | Manufacturer |
|---|---|
| S6165-61531-000 PRIMARY | Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp (USA) |
NSN 5340-00-700-2439 is a Seat,helical Compression Spring, manufactured by Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-700-2439 has 1 manufacturer part number on file: S6165-61531-000 (Sikorsky Aircraft Corporation Dba Sikorsky Aircraft Corp).
Key specifications for S6165-61531-000: FSC Application Data: VERTICAL GYRO CONTROL; First Step Diameter: 1.0000 INCHES NOMINAL IN; End Diameter: 0.5800 INCHES NOMINAL IN; Second End Diameter: 0.6550 INCHES NOMINAL IN. 9 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.