The Retainer,helical Compression Spr, cataloged under National Stock Number 5340-01-344-4542, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-344-4542 |
| Item Name | Retainer,helical Compression Spr |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Flange Diameter | 1.836 INCHES NOMINAL IN |
| Material Hardness Rating | 52.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM |
| Flange Thickness | 0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN |
| Body Outside Diameter | 0.896 INCHES MINIMUM AND 0.916 INCHES MAXIMUM IN |
| Style Designator | IRREGULAR |
| Material Document and Classification | AMS 6417 ASSN STD SINGLE MATERIAL RESPONSE |
| Mounting Hole Diameter | 0.204 INCHES MINIMUM AND 0.229 INCHES MAXIMUM IN |
| Body Inside Diameter | 0.766 INCHES MINIMUM AND 0.796 INCHES MAXIMUM IN |
| Casehardening Indicator | NOT CASEHARDENED |
| Bolt Circle Diameter | 1.400 INCHES NOMINAL IN |
| Material | STEEL COMP E4340 |
| 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 |
|---|---|
| 741675 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-01-344-4542 is a Retainer,helical Compression Spr, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-01-344-4542: Flange Diameter: 1.836 INCHES NOMINAL IN; Overall Height: 2.050 INCHES NOMINAL IN; Material Hardness Rating: 52.0 ROCKWELL C MINIMUM AND 55.0 ROCKWELL C MAXIMUM; Flange Thickness: 0.084 INCHES MINIMUM AND 0.104 INCHES MAXIMUM IN. 11 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.