The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-557-3290, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Leslie Controls, Inc. Dba Leslie Controls Inc. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-557-3290 |
| Primary Part Number | Y101946249/CD34440N |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Leslie Controls, Inc. Dba Leslie Controls Inc |
| Status | ACTIVE |
| Flow Control Device | NEEDLE |
| Second End Relationship with First End | IDENTICAL |
| Remote Actuation Method | DIAPHRAGM |
| Body Style | STRAIGHT THRU |
| Face to Face Distance | 8.250 INCHES NOMINAL IN |
| Supplementary Features | APPLICATION: MAIN FEED WATER |
| End Connection Quantity | 2 |
| Valve Size | 1.000 INCHES IN |
| Specification/standard Data | MIL-V-18030D GOVERNMENT SPECIFICATION |
| Nondefinitive Spec/std Data | I TYPE AND D COMPOSITION |
| First End Connection Type | PLAIN FACE FLANGE |
| Material | STEEL BODY |
| Media for Which Designed | WATER |
| Maximum Inlet Pressure Rating | ERR-060 |
| Furnished Items | EXTERNAL PILOT VALVE AND LEVER HANDLE |
| End Connection Spec/std | ANSI 16.5 |
| Outlet Pressure Setting | ERR-060 |
| 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 |
|---|---|
| Y101946249 | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| Y101946249/CD34440N PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| MIL-V-18030 | 4/1 Identification reference U.S. Government activity |
| CD34440 | D/9 Drawing number reference only Leslie Controls, Inc. Dba Leslie Controls Inc |
NSN 4820-01-557-3290 is a Valve,regulating,fluid Pressure, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-557-3290 has 2 manufacturer part numbers on file: Y101946249 (Leslie Controls, Inc. Dba Leslie Controls Inc), Y101946249/CD34440N (Leslie Controls, Inc. Dba Leslie Controls Inc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-560-2867. Verify interchangeability with system specifications before substitution.
Key specifications for Y101946249/CD34440N: Flow Control Device: NEEDLE; Second End Relationship with First End: IDENTICAL; Remote Actuation Method: DIAPHRAGM; Body Style: STRAIGHT THRU. 18 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.