The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-021-9826, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Union Carbide Corp Sub of Dow Co the. Government technical data includes 17 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-021-9826 |
| Primary Part Number | 998324 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Union Carbide Corp Sub of Dow Co the |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Second End Relationship with First End | NOT IDENTICAL |
| Second End Thread Class | 2A A |
| Body Style | ANGLE |
| Regulation Type | MANUAL SINGLE STAGE |
| First End Seat Angle in Deg | 37.0 |
| First End Thread Class | 2A A |
| First End Style Designator | FLARED |
| Temp Rating | 180.0 FAHRENHEIT MAXIMUM DEGF |
| End Connection Quantity | 2 |
| Valve Loading Method | SPRING |
| Second End Style Designator | FLARED |
| First End Outside Diameter Tube Accommodated | 0.375 INCHES NOMINAL IN |
| Media for Which Designed | OXYGEN, GASEOUS |
| Thread Size and Series/type Designator | 9/16-18 UNF FIRST END |
| Thread Size and Series/type Designator | 0.903-14 NGO SECOND END |
| Filter | NOT INCLUDED |
| 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 |
|---|---|
| 998324 PRIMARY | Union Carbide Corp Sub of Dow Co the (USA) |
| Reference | Meaning |
|---|---|
| 04X45 | 5/9 Secondary reference Union Carbide Corp Sub of Dow Co the |
NSN 4820-00-021-9826 is a Valve,regulating,fluid Pressure, manufactured by Union Carbide Corp Sub of Dow Co the, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-021-9826 has 1 manufacturer part number on file: 998324 (Union Carbide Corp Sub of Dow Co the).
Key specifications for 998324: Flow Control Device: POPPET; Second End Relationship with First End: NOT IDENTICAL; Second End Thread Class: 2A A; Body Style: ANGLE. 17 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.