The Retainer,helical Compression Spr, cataloged under National Stock Number 5340-00-573-3153, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is The Boeing Company Div Commercial. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-00-573-3153 |
| Primary Part Number | 66-2418 |
| Item Name | Retainer,helical Compression Spr |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | The Boeing Company Div Commercial |
| Status | ACTIVE |
| Flange Diameter | 0.780 INCHES NOMINAL IN |
| Flange Thickness | 0.060 INCHES NOMINAL IN |
| Body Outside Diameter | 0.560 INCHES NOMINAL IN |
| Style Designator | PARALLEL |
| Material Document and Classification | MIL-S-5000, COMP 4340 MIL SPEC SINGLE MATERIAL RESPONSE |
| Body Inside Diameter | 0.460 INCHES MINIMUM AND 0.470 INCHES MAXIMUM IN |
| Lip Thickness | 0.100 INCHES NOMINAL IN |
| Material | STEEL COMP 4340 |
| End Hole Diameter | 0.421 INCHES MINIMUM AND 0.423 INCHES MAXIMUM IN |
| 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 |
|---|---|
| 66-2418 PRIMARY | The Boeing Company Div Commercial (USA) |
| Reference | Meaning |
|---|---|
| 66-2418 | 5/9 Secondary reference U.S. Government activity |
NSN 5340-00-573-3153 is a Retainer,helical Compression Spr, manufactured by The Boeing Company Div Commercial, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-573-3153 has 1 manufacturer part number on file: 66-2418 (The Boeing Company Div Commercial).
Key specifications for 66-2418: Flange Diameter: 0.780 INCHES NOMINAL IN; Overall Height: 0.580 INCHES NOMINAL IN; Flange Thickness: 0.060 INCHES NOMINAL IN; Body Outside Diameter: 0.560 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.