The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-00-021-3566, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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.
| Parameter | Value |
|---|---|
| NSN | 5340-00-021-3566 |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Width Across Flats | 1.375 INCHES NOMINAL IN |
| Design Type | THREADED |
| Material Document and Classification | QQ-A-225/6, ALLOY 2024, T351 FED SPEC SINGLE MATERIAL RESPONSE |
| Surface Treatment | PAINT |
| Thread Class | 3B |
| Material | ALUMINUM ALLOY 2024 |
| Thread Size and Series/type Designator | 1.125-12 UNF |
| Inside Diameter Length | 0.620 INCHES NOMINAL IN |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 26-502509 | D/9 Drawing number reference only U.S. Government activity |
| 26-501509-1 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-00-021-3566 is a Cap,protective,dust and Moisture, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-00-021-3566: Width Across Flats: 1.375 INCHES NOMINAL IN; Design Type: THREADED; Material Document and Classification: QQ-A-225/6, ALLOY 2024, T351 FED SPEC SINGLE MATERIAL RESPONSE; Surface Treatment: PAINT. 8 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.