The Plug,protective,dust and Moistur, cataloged under National Stock Number 5340-00-521-9591, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5340-00-521-9591 |
| Item Name | Plug,protective,dust and Moistur |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Design Type | THREADED |
| Overall Diameter | 1.400 INCHES NOMINAL IN |
| Drive Type | RAISED RIB |
| Thread Pitch Diameters | +1.2421 TO 1.2477 INCHES IN |
| Features Provided | BEVELED SEAT AND SHOULDER |
| Material | PLASTIC, POLYETHYLENE (PP) |
| Thread Size and Series/type Designator | 1.188-12 UNS |
| 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 |
| Reference | Meaning |
|---|---|
| PD140 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-00-521-9591 is a Plug,protective,dust and Moistur, classified under FSC 5340, Hardware, Commercial. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 6350-01-553-1624. Verify interchangeability with system specifications before substitution.
Key specifications for 5340-00-521-9591: Design Type: THREADED; Overall Diameter: 1.400 INCHES NOMINAL IN; Drive Type: RAISED RIB; Thread Pitch Diameters: +1.2421 TO 1.2477 INCHES 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.