The Plug,vent, cataloged under National Stock Number 5340-01-271-4891, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. Government technical data includes 8 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 5340-01-271-4891 |
| Item Name | Plug,vent |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Status | ACTIVE |
| End Connection Type | THREADED |
| Criticality Code Justification | ZZZY |
| Outside Diameter | 0.438 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Material | NICKEL ALLOY |
| Thread Size and Series/type Designator | 7/16-20 UNF |
| Vent Hole Quantity | 1 |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| 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 |
| Reference | Meaning |
|---|---|
| 216-5007719 PC5 | 3/1 Design control — primary reference Naval Sea Systems Command |
| MIL-F-21467 FIG 14 | 5/9 Secondary reference U.S. Government activity |
| MIL-F-21467 | 4/1 Identification reference U.S. Government activity |
| MIL-F-21467/FIG 17(16-20UNF2A) | 5/1 Secondary reference U.S. Government activity |
NSN 5340-01-271-4891 is a Plug,vent, classified under FSC 5340, Hardware, Commercial. Status: active.
Key specifications for 5340-01-271-4891: End Connection Type: THREADED; Criticality Code Justification: ZZZY; Outside Diameter: 0.438 INCHES NOMINAL IN; Thread Class: 2A A. 8 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.