The Valve,plug, cataloged under National Stock Number 4820-00-973-7965, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is U S Dept of Transportation Federal Aviation Administration. Government technical data includes 20 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-973-7965 |
| Primary Part Number | 311-223 3-4D |
| Item Name | Valve,plug |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | U S Dept of Transportation Federal Aviation Administration |
| Status | ACTIVE |
| Nominal Pipe Size Accommodated | 0.750 INCHES FIRST END IN |
| Connection Style | PLAIN,OPTIONAL END(PIPE) FIRST END |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Flow Style | THREE-WAY TWO PORT BOTTOM OUTLET 90 DEGREE PLUG TURN |
| Operating Pressure | 90.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Features Provided | NONADJUSTABLE ROTATION |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Maximum Operating Temp | 25.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Mounting Facility | BRACKET(S) |
| Surface Treatment | ANODIZE |
| Media for Which Designed | HYDROGEN SECOND RESPONSE |
| Media for Which Designed | AIR FIRST RESPONSE |
| Thread Quantity Per Inch | 14 FIRST END |
| Material | ALUMINUM SEAT |
| Material | ALUMINUM STEM |
| Material | ALUMINUM BODY |
| Material | PLASTIC POLYAMIDE NYLON FLOW CONTROL DEVICE |
| Thread Series Designator | NPT FIRST END |
| Valve Operation Method | MANUAL |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | N |
| Part Number | Manufacturer |
|---|---|
| 311-223 3-4D PRIMARY | U S Dept of Transportation Federal Aviation Administration (USA) |
| 381-1080P1 | Raytheon Company Div Corp (USA) |
| Reference | Meaning |
|---|---|
| 311-223 3-4D | 5/9 Secondary reference U.S. Government activity |
| 381-1080P1 | 5/2 Secondary reference U.S. Government activity |
NSN 4820-00-973-7965 is a Valve,plug, manufactured by U S Dept of Transportation Federal Aviation Administration, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-973-7965 has 2 manufacturer part numbers on file: 311-223 3-4D (U S Dept of Transportation Federal Aviation Administration), 381-1080P1 (Raytheon Company Div Corp).
Key specifications for 311-223 3-4D: Nominal Pipe Size Accommodated: 0.750 INCHES FIRST END IN; Connection Style: PLAIN,OPTIONAL END(PIPE) FIRST END; Connection Type: THREADED INTERNAL PIPE FIRST END; Flow Style: THREE-WAY TWO PORT BOTTOM OUTLET 90 DEGREE PLUG TURN. 20 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.