The Plug,vent, cataloged under National Stock Number 5340-00-226-2528, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Northrop Grumman Systems Corporation. Government technical data includes 13 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-00-226-2528 |
| Primary Part Number | 128HM10394-1 |
| Item Name | Plug,vent |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Northrop Grumman Systems Corporation |
| Status | ACTIVE |
| Refinement Medium Type | FILTERING |
| Vent Hole Diameter | 0.063 INCHES NOMINAL IN |
| Length | 0.719 INCHES NOMINAL IN |
| Vent Hole Shape | ROUND |
| Thread Length | 0.349 INCHES NOMINAL IN |
| End Connection Type | THREADED |
| Outside Diameter | 0.813 INCHES NOMINAL IN |
| Inside Diameter | 0.248 INCHES NOMINAL IN |
| Thread Class | 3A A |
| Material | ALUMINUM ALLOY |
| Thread Size and Series/type Designator | 0.563-18 UNF |
| Vent Hole Quantity | 1 |
| Refinement Device Type | FILTER DISK |
| 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 |
| Part Number | Manufacturer |
|---|---|
| 128HM10394-1 PRIMARY | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| 128HM10394 | D/9 Drawing number reference only Northrop Grumman Systems Corporation |
| 128HM10394-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation |
NSN 5340-00-226-2528 is a Plug,vent, manufactured by Northrop Grumman Systems Corporation, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-226-2528 has 1 manufacturer part number on file: 128HM10394-1 (Northrop Grumman Systems Corporation).
Key specifications for 128HM10394-1: Refinement Medium Type: FILTERING; Vent Hole Diameter: 0.063 INCHES NOMINAL IN; Length: 0.719 INCHES NOMINAL IN; Vent Hole Shape: ROUND. 13 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.