The Valve,safety Relief, cataloged under National Stock Number 4820-01-449-8468, 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 22 specifications, cited from the U.S. Government catalog. The record lists 3 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-449-8468 |
| Primary Part Number | YB2385FG685 |
| 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 |
| Flange Face Design | PLAIN ALL ENDS |
| Bolt Circle Nominal Diameter | 3.500 INCHES SECOND END IN |
| Bolt Circle Nominal Diameter | 3.875 INCHES FIRST END IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.625 INCHES ALL ENDS IN |
| Valve Size | 1.500 INCHES IN |
| Adjustable Pressure Range | +45.0 TO 70.0 POUNDS PER SQUARE INCH LBS |
| Nominal Outside Diameter | 1.500 INCHES FIRST END IN |
| Nominal Outside Diameter | 1.250 INCHES SECOND END IN |
| Disk Loading Method | SPRING |
| Bolt Hole Quantity | 4 ALL ENDS |
| Material | COPPER ALLOY BODY |
| Material | NICKEL ALLOY STEM |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | NICKEL ALLOY SEAT |
| Material | RUBBER PACKING |
| Valve Operation Method | AUTOMATIC |
| Nominal Thickness | 0.406 INCHES SECOND END IN |
| Nominal Thickness | 0.438 INCHES FIRST END IN |
| 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 |
|---|---|
| 3457 11/4X11/2IN 45TO70PSI | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| 1385 11/4X11/2IN 45TO70PSI | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| YB2385FG685 PRIMARY | Leslie Controls, Inc. Dba Leslie Controls Inc (USA) |
| Reference | Meaning |
|---|---|
| 1385 1 1/4 X 1 | C/1 Advisory reference — outside the item-of-supply concept Leslie Controls, Inc. Dba Leslie Controls Inc |
| 2385FG685 | 5/9 Secondary reference Leslie Controls, Inc. Dba Leslie Controls Inc |
NSN 4820-01-449-8468 is a Valve,safety Relief, manufactured by Leslie Controls, Inc. Dba Leslie Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-449-8468 has 3 manufacturer part numbers on file: 3457 11/4X11/2IN 45TO70PSI (Leslie Controls, Inc. Dba Leslie Controls Inc), 1385 11/4X11/2IN 45TO70PSI (Leslie Controls, Inc. Dba Leslie Controls Inc), YB2385FG685 (Leslie Controls, Inc. Dba Leslie Controls Inc).
Key specifications for YB2385FG685: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Flange Face Design: PLAIN ALL ENDS; Bolt Circle Nominal Diameter: 3.500 INCHES SECOND END IN. 22 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.