The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-590-4497, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is National Welders Supply Company, Inc. Dba Airgas National Welders. Government technical data includes 7 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-590-4497 |
| Primary Part Number | Y12-244A(350)-AG |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | National Welders Supply Company, Inc. Dba Airgas National Welders |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| Regulation Type | AUTOMATIC DOUBLE STAGE |
| Temp Rating | -40.0 FAHRENHEIT MINIMUM AND 165.0 FAHRENHEIT MAXIMUM DEGF |
| Material Document and Classification | QQ-S-763, CLASS 302, 303, 304, 305, 310, OR 316 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE |
| Material | COPPER ALLOY BODY |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Maximum Inlet Pressure Rating | ERR-060 |
| 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 |
|---|---|
| Y12-244A(350)-AG PRIMARY | National Welders Supply Company, Inc. Dba Airgas National Welders (USA) |
| Reference | Meaning |
|---|---|
| 8468771 | D/9 Drawing number reference only Naval Sea Systems Command |
| 200-8468771 ITEM F-12 | 5/1 Secondary reference Naval Sea Systems Command |
| Y12-D244A(350) | 5/9 Secondary reference National Welders Supply Company, Inc. Dba Airgas National Welders |
NSN 4820-01-590-4497 is a Valve,regulating,fluid Pressure, manufactured by National Welders Supply Company, Inc. Dba Airgas National Welders, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-590-4497 has 1 manufacturer part number on file: Y12-244A(350)-AG (National Welders Supply Company, Inc. Dba Airgas National Welders).
Key specifications for Y12-244A(350)-AG: Flow Control Device: DIAPHRAGM; Regulation Type: AUTOMATIC DOUBLE STAGE; Temp Rating: -40.0 FAHRENHEIT MINIMUM AND 165.0 FAHRENHEIT MAXIMUM DEGF; Material Document and Classification: QQ-S-763, CLASS 302, 303, 304, 305, 310, OR 316 FED SPEC SINGLE MATERIAL RESPONSE FLOW CONTROL DEVICE. 7 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.