The Plug,vent, cataloged under National Stock Number 5340-00-956-3331, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5340-00-956-3331 |
| Item Name | Plug,vent |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| Vent Hole Diameter | 0.062 INCHES NOMINAL IN |
| Length | 0.500 INCHES NOMINAL IN |
| Vent Hole Shape | ROUND |
| Thread Length | 0.250 INCHES NOMINAL IN |
| End Connection Type | THREADED |
| Outside Diameter | 0.750 INCHES NOMINAL IN |
| Surface Treatment | ANODIZE |
| Thread Class | 3B |
| Material | ALUMINUM ALLOY |
| Thread Size and Series/type Designator | 0.750-16 UNF |
| Vent Hole Quantity | 3 |
| 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 |
|---|---|
| 6002058 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5340-00-956-3331 is a Plug,vent, classified under FSC 5340, Hardware, Commercial. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 4140-01-544-3957. Verify interchangeability with system specifications before substitution.
Key specifications for 5340-00-956-3331: Vent Hole Diameter: 0.062 INCHES NOMINAL IN; Length: 0.500 INCHES NOMINAL IN; Vent Hole Shape: ROUND; Thread Length: 0.250 INCHES NOMINAL IN. 11 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.