The Cover,protective,dust and Moistu, cataloged under National Stock Number 5340-01-499-2427, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Naval Sea Systems Command. Government technical data includes 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-499-2427 |
| Primary Part Number | 563-7066807-12 |
| Item Name | Cover,protective,dust and Moistu |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Length Under Shoulder | 13.000 INCHES NOMINAL IN |
| Material Document and Classification | QQ-A-250/11, ALLOY 6061-T651 FED SPEC SINGLE MATERIAL RESPONSE |
| Material | ALUMINUM ALLOY 6061 |
| 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 |
|---|---|
| 563-7066807-12 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| H552-0602-12 | 5/2 Secondary reference U.S. Government activity |
| 7066807 | D/9 Drawing number reference only Naval Sea Systems Command |
NSN 5340-01-499-2427 is a Cover,protective,dust and Moistu, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-499-2427 has 1 manufacturer part number on file: 563-7066807-12 (Naval Sea Systems Command).
1 possible match (shared part number, not a government interchangeability claim): 5340-01-499-2456. Verify interchangeability with system specifications before substitution.
Key specifications for 563-7066807-12: Length Under Shoulder: 13.000 INCHES NOMINAL IN; Material Document and Classification: QQ-A-250/11, ALLOY 6061-T651 FED SPEC SINGLE MATERIAL RESPONSE; Special Features: THIS ITEM (INCLUDES QUANTITY OF TWO) IS CALLED AN "IN-PORT COVER" BY VENDOR AND IS TO BE FITTED TO INSERT CONTOUR IN THE SHOP AND MAY BE REMOVED AND INSTALLED AFTER ASSEMBLIES HAVE BEEN WELDED IN THE SHIP;THIS ITEM MEASURES 11.750 INCHES BETWEEN END-HOLE CENTERS ALONG THE LENGTH IN; End Item Identification: VALVE ASSEMBLY VENT. 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.