The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-01-421-2040, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-421-2040 |
| Primary Part Number | 2020AS109 |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier |
| Status | ACTIVE |
| Design Type | FRICTION |
| Material Document and Classification | QQ-A-200/11, ALLOY 7075, T73 FED SPEC SINGLE MATERIAL RESPONSE |
| Material | ALUMINUM ALLOY 7075 |
| 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 |
|---|---|
| 2020AS109 PRIMARY | Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier (USA) |
| MBEU146503 | Martin-Baker Aircraft Company Limited (GBR) |
| Reference | Meaning |
|---|---|
| 5340PL1858102 | 6/9 Informative reference only Jednolity Indeks Materialowy - Uniform Material Index |
NSN 5340-01-421-2040 is a Cap,protective,dust and Moisture, manufactured by Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-421-2040 has 2 manufacturer part numbers on file: 2020AS109 (Naval Air Systems Command Managed Original Design Activity Not Material/parts Supplier), MBEU146503 (Martin-Baker Aircraft Company Limited).
Key specifications for 2020AS109: Design Type: FRICTION; Material Document and Classification: QQ-A-200/11, ALLOY 7075, T73 FED SPEC SINGLE MATERIAL RESPONSE; Material: ALUMINUM ALLOY 7075. 3 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.