The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-01-512-0423, 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 6 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. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-512-0423 |
| Primary Part Number | 555-6405456-9902 |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Design Type | THREADED |
| Overall Diameter | 3.000 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Thread Size and Series/type Designator | 1.50-11.50 NPSH |
| Inside Diameter Length | 2.060 INCHES NOMINAL IN |
| Round Cap Outside Surface Condition | RIBBED |
| 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 |
|---|---|
| DF2402-701-9902 | Huntington Ingalls Inc Div Newport News Shipbuilding (USA) |
| 555-6405456-9902 PRIMARY | Naval Sea Systems Command (USA) |
NSN 5340-01-512-0423 is a Cap,protective,dust and Moisture, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-512-0423 has 2 manufacturer part numbers on file: DF2402-701-9902 (Huntington Ingalls Inc Div Newport News Shipbuilding), 555-6405456-9902 (Naval Sea Systems Command).
Key specifications for 555-6405456-9902: Design Type: THREADED; Overall Diameter: 3.000 INCHES NOMINAL IN; Special Features: MATERIAL IS ALLOY C71500, MIL-C-24679; HEIGHT IS 1.25 INCHES INCLUDING QUARTER INCH KNOB ON TOP IN; End Item Identification: VIRGINIA CLASS SSN; MISC POTABLES. 6 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.