The Cap,protective,dust and Moisture, cataloged under National Stock Number 5340-01-556-2018, 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 7 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 5340-01-556-2018 |
| Primary Part Number | 18902 PC3 |
| Item Name | Cap,protective,dust and Moisture |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Design Type | FRICTION |
| Overall Diameter | 1.600 INCHES NOMINAL IN |
| Criticality Code Justification | FEAT |
| Opening Inside Diameter for Which Designed | 1.400 INCHES NOMINAL IN |
| Material | COPPER ALLOY |
| Inside Diameter Length | 0.300 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 | Y |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 18902 PC3 PRIMARY | Naval Sea Systems Command (USA) |
| Reference | Meaning |
|---|---|
| 18902 PC3 | 3/9 Design control — primary reference Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier |
NSN 5340-01-556-2018 is a Cap,protective,dust and Moisture, manufactured by Naval Sea Systems Command, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-01-556-2018 has 1 manufacturer part number on file: 18902 PC3 (Naval Sea Systems Command).
Key specifications for 18902 PC3: Design Type: FRICTION; Overall Diameter: 1.600 INCHES NOMINAL IN; Criticality Code Justification: FEAT; Opening Inside Diameter for Which Designed: 1.400 INCHES NOMINAL IN. 7 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.