The Valve,safety Relief, cataloged under National Stock Number 4820-01-271-1900, 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 5 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-271-1900 |
| Primary Part Number | YB2385A224 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Leslie Controls, Inc. Dba Leslie Controls Inc |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Adjustable Pressure Range | +30.0 TO 50.0 POUNDS PER SQUARE INCH LBS |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Material | COPPER ALLOY BODY |
| Valve Operation Method | AUTOMATIC |
| 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 |
|---|---|
| YB2385A224 PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| 50-105-0454-1 | C/1 Advisory reference — outside the item-of-supply concept Timken Gears & Services Inc. Div Philadelphia Gear |
| 2385A224 | 5/9 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
| 1385 1/4 PL4149/4126 30T50 | 5/9 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
NSN 4820-01-271-1900 is a Valve,safety Relief, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-271-1900 has 1 manufacturer part number on file: YB2385A224 (Leslie Controls, Inc. Dba Leslie Controls Inc).
Key specifications for YB2385A224: Flow Control Device: DISK; Adjustable Pressure Range: +30.0 TO 50.0 POUNDS PER SQUARE INCH LBS; Nominal Thread Size: 0.250 INCHES ALL ENDS IN; Material: COPPER ALLOY BODY. 5 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.