The Valve,vent, cataloged under National Stock Number 4820-01-627-2827, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Irwin International, Inc. Dba Irwin International Inc. Government technical data includes 4 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-627-2827 |
| Primary Part Number | 05-0779 |
| Item Name | Valve,vent |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Irwin International, Inc. Dba Irwin International Inc |
| Status | ACTIVE |
| Flange Shape | ROUND ALL ENDS |
| Nominal Outside Diameter | 2.75 INCHES ALL ENDS IN |
| Surface Treatment | ANODIZE |
| Material | ALUMINUM OVERALL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 05-0779 PRIMARY | Irwin International, Inc. Dba Irwin International Inc (USA) |
| 10680B ACS BLOCK VENT | Irwin International, Inc. Dba Irwin International Inc (USA) |
| Reference | Meaning |
|---|---|
| 05-0779 | 5/9 Secondary reference Aircraft Spruce and Specialty Co a Div of Honeywell Inc |
NSN 4820-01-627-2827 is a Valve,vent, manufactured by Irwin International, Inc. Dba Irwin International Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-627-2827 has 2 manufacturer part numbers on file: 05-0779 (Irwin International, Inc. Dba Irwin International Inc), 10680B ACS BLOCK VENT (Irwin International, Inc. Dba Irwin International Inc).
Key specifications for 05-0779: Flange Shape: ROUND ALL ENDS; Nominal Outside Diameter: 2.75 INCHES ALL ENDS IN; Special Features: INCLUDES 4 MOUNTING HOLES; COLOR-BLACK; Surface Treatment: ANODIZE. 4 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). 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.