The Plug,vent, cataloged under National Stock Number 5340-00-953-0261, is classified within Federal Supply Class 5340 (Hardware, Commercial) of the Hardware and Abrasives group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions. Government technical data includes 9 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 5340-00-953-0261 |
| Primary Part Number | PLU263 |
| Item Name | Plug,vent |
| FSC / FSG | 5340 / 53 — Hardware, Commercial |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| Status | ACTIVE |
| Vent Hole Diameter | 0.062 INCHES NOMINAL IN |
| Length | 0.406 INCHES NOMINAL IN |
| Vent Hole Shape | ROUND |
| End Connection Type | UNTHREADED |
| Material Document and Classification | QQ-B-626 FED SPEC SINGLE MATERIAL RESPONSE |
| Outside Diameter | 1.062 INCHES NOMINAL IN |
| Inside Diameter | 0.732 INCHES NOMINAL IN |
| Material | COPPER ALLOY 360 |
| Vent Hole Quantity | 1 |
| 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 |
|---|---|
| PLU263 PRIMARY | Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| PLU263 | 5/9 Secondary reference U.S. Government activity |
| 1329N | 5/9 Secondary reference U.S. Government activity |
| HL19623-69 | 5/9 Secondary reference U.S. Government activity |
| PLU263 | 3/9 Design control — primary reference Siemens Energy, Inc. Dba Dresser-Rand |
NSN 5340-00-953-0261 is a Plug,vent, manufactured by Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions, classified under FSC 5340, Hardware, Commercial. Status: active.
NSN 5340-00-953-0261 has 1 manufacturer part number on file: PLU263 (Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions).
Key specifications for PLU263: Vent Hole Diameter: 0.062 INCHES NOMINAL IN; Length: 0.406 INCHES NOMINAL IN; Vent Hole Shape: ROUND; End Connection Type: UNTHREADED. 9 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.