The Retainer,helical Compression Spr, cataloged under National Stock Number 5340-00-765-2406, 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10 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-00-765-2406 |
| Item Name | Retainer,helical Compression Spr |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Flange Diameter | 1.358 INCHES MINIMUM AND 1.360 INCHES MAXIMUM IN |
| FSC Application Data | TAILROTOR DRIVESHAFT COUPLING,HELICOPTER |
| Flange Thickness | 0.200 INCHES NOMINAL IN |
| Body Outside Diameter | 1.060 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-225/6, ALLOY 2024 FED SPEC SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.073 INCHES NOMINAL IN |
| Body Inside Diameter | 0.940 INCHES NOMINAL IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM ALLOY 2024 |
| 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 |
|---|---|
| 204-040-607-003 | 3/2 Design control — primary reference U.S. Government activity |
| 204-040-607-3 | 5/9 Secondary reference U.S. Government activity |
NSN 5340-00-765-2406 is a Retainer,helical Compression Spr, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-00-765-2406: Flange Diameter: 1.358 INCHES MINIMUM AND 1.360 INCHES MAXIMUM IN; Overall Height: 1.800 INCHES NOMINAL IN; FSC Application Data: TAILROTOR DRIVESHAFT COUPLING,HELICOPTER; Flange Thickness: 0.200 INCHES NOMINAL IN. 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.