The Valve,safety Relief, cataloged under National Stock Number 4820-01-320-1223, 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 30 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-320-1223 |
| Primary Part Number | YB2385FG684 |
| 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 |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Furnished Items and Quantity | 1 LEVER |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 3.312 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 3.375 INCHES SECOND END IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Material Document and Classification | ASTMB61 ASSN STD SINGLE MATERIAL RESPONSE BODY |
| Material Document and Classification | QQ-N-228 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Material Document and Classification | QQ-N-228 FED SPEC SINGLE MATERIAL RESPONSE STEM |
| Bolt Hole Nominal Diameter | 0.562 INCHES ALL ENDS IN |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Size | 1.500 INCHES IN |
| Adjustable Pressure Range | +30.0 TO 50.0 POUNDS PER SQUARE INCH LBS |
| Features Provided | PRESSURE TIGHT OUTLET SIDE |
| Bonnet Type | INSIDE SCREW |
| Specification/standard Data | 81349-MIL-V-24332 GOVERNMENT SPECIFICATION |
| Maximum Operating Temp | 180.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Second Connection Face to Centerline Distance | 3.750 INCHES IN |
| Nondefinitive Spec/std Data | B GRADE |
| Nominal Outside Diameter | 4.500 INCHES SECOND END IN |
| Nominal Outside Diameter | 5.062 INCHES FIRST END IN |
| Disk Loading Method | SPRING |
| Bolt Hole Quantity | 6 FIRST END |
| Bolt Hole Quantity | 4 SECOND END |
| Bonnet Attachment Method | THREADED |
| Media for Which Designed | WATER, SALT SINGLE RESPONSE |
| First Connection Face to Centerline Distance | 3.750 INCHES IN |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| YB2385FG684 PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| 1385 B/M2385FG684 | 5/9 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
| MIL-V-24332 | 5/9 Secondary reference U.S. Government activity |
| MIL-DTL-24332 | 4/1 Identification reference U.S. Government activity |
NSN 4820-01-320-1223 is a Valve,safety Relief, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-320-1223 has 1 manufacturer part number on file: YB2385FG684 (Leslie Controls, Inc. Dba Leslie Controls Inc).
Key specifications for YB2385FG684: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Furnished Items and Quantity: 1 LEVER; Flange Face Design: PLAIN ALL ENDS. 30 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.