The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-00-900-4764, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Molded Devices, Inc. Dba Mdi Div Molded Devices. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 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 | 5340-00-900-4764 |
| Primary Part Number | 840520EC |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Molded Devices, Inc. Dba Mdi Div Molded Devices |
| Status | ACTIVE |
| Design Type | FRICTION |
| Overall Diameter | 4.808 INCHES NOMINAL IN |
| Tube Outside Diameter for Which Designed | 4.000 INCHES NOMINAL IN |
| Material | PLASTIC VINYL |
| Inside Diameter Length | 0.344 INCHES NOMINAL IN |
| Round Cap Outside Surface Condition | SMOOTH |
| 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 |
NSN 5340-00-900-4764 is a Cap,protective,dust and Moisture, manufactured by Molded Devices, Inc. Dba Mdi Div Molded Devices, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-900-4764 has 3 manufacturer part numbers on file: 840520 (Molded Devices, Inc. Dba Mdi Div Molded Devices), FC-400 (Sinclair & Rush, Inc. Dba Sinclair & Rush Inc), 840520EC (Molded Devices, Inc. Dba Mdi Div Molded Devices).
1 possible match (shared part number, not a government interchangeability claim): 2930-01-685-2615. Verify interchangeability with system specifications before substitution.
Key specifications for 840520EC: Design Type: FRICTION; Overall Diameter: 4.808 INCHES NOMINAL IN; Tube Outside Diameter for Which Designed: 4.000 INCHES NOMINAL IN; Material: PLASTIC VINYL. 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.