The Valve,vent, cataloged under National Stock Number 4820-01-250-5083, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Aerospace Lighting Corporation. Government technical data includes 12 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 2 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-250-5083 |
| Primary Part Number | 2765-5 |
| Item Name | Valve,vent |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Aerospace Lighting Corporation |
| Status | ACTIVE |
| Flange Shape | RECTANGULAR WITH HOLES ALL ENDS |
| Flange Face Design | PLAIN ALL ENDS |
| Nominal Length | 2.125 INCHES ALL ENDS IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Bolt Hole Nominal Diameter | 0.128 INCHES ALL ENDS IN |
| Bolt Hole Quantity | 4 ALL ENDS |
| Surface Treatment | ANODIZE |
| Media for Which Designed | AIR FIRST RESPONSE |
| Media for Which Designed | WATER, FRESH SECOND RESPONSE |
| Material | ALUMINUM ALLOY 2024 OVERALL |
| Nominal Thickness | 0.050 INCHES ALL ENDS IN |
| 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 |
|---|---|
| GV500AAE1 | Northrop Grumman Systems Corporation (USA) |
| 2765-5 PRIMARY | Aerospace Lighting Corporation (USA) |
| Reference | Meaning |
|---|---|
| 2765-5 | 5/9 Secondary reference Aid International |
| GV500AAE | 7/1 Vendor item drawing reference Northrop Grumman Systems Corporation |
| 2765-5 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-250-5083 is a Valve,vent, manufactured by Aerospace Lighting Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-250-5083 has 2 manufacturer part numbers on file: GV500AAE1 (Northrop Grumman Systems Corporation), 2765-5 (Aerospace Lighting Corporation).
2 possible matches (shared part number, not a government interchangeability claim): 5905-01-399-5496, 6620-01-562-8816. Verify interchangeability with system specifications before substitution.
Key specifications for 2765-5: Flange Shape: RECTANGULAR WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Nominal Length: 2.125 INCHES ALL ENDS IN; Connection Type: FLANGE ALL ENDS. 12 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.