The Valve,safety Relief, cataloged under National Stock Number 4820-01-177-8459, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 30 specifications, cited from the U.S. Government catalog. 9 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-177-8459 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Flange Shape | ROUND WITH HOLES ALL ENDS |
| Furnished Items and Quantity | 1 LEVER |
| Flange Face Design | RAISED STRAIGHT ALL ENDS |
| Bolt Circle Nominal Diameter | 3.125 INCHES FIRST END IN |
| Bolt Circle Nominal Diameter | 2.375 INCHES SECOND END IN |
| Connection Type | FLANGE ALL ENDS |
| Style Designator | ANGLE FLANGED ENDS |
| Bolt Hole Nominal Diameter | 0.625 INCHES ALL ENDS IN |
| Valve Size | 0.500 INCHES IN |
| Adjustable Pressure Range | +171.0 TO 209.0 POUNDS PER SQUARE INCH LBS |
| Bonnet Type | INSIDE SCREW |
| Specification/standard Data | 81349-MIL-V-24332 GOVERNMENT SPECIFICATION |
| Second Connection Face to Centerline Distance | 3.438 INCHES IN |
| Nondefinitive Spec/std Data | B GRADE |
| Nominal Outside Diameter | 3.500 INCHES SECOND END IN |
| Nominal Outside Diameter | 4.250 INCHES FIRST END IN |
| Disk Loading Method | SPRING |
| Bolt Hole Quantity | 4 ALL ENDS |
| Bonnet Attachment Method | BOLTED |
| First Connection Face to Centerline Distance | 3.438 INCHES IN |
| Material | STEEL BODY |
| Material | NICKEL ALLOY FLOW CONTROL DEVICE |
| Material | NICKEL ALLOY SEAT |
| Material | STEEL CORROSION RESISTING STEM |
| Raised Face Nominal Diameter | 1.375 INCHES ALL ENDS IN |
| Opening Pressure Setting | 190.0 POUNDS PER SQUARE INCH LBS |
| Valve Operation Method | AUTOMATIC |
| Raised Face Nominal Height | 0.062 INCHES ALL ENDS IN |
| Nominal Thickness | 0.375 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 |
| Reference | Meaning |
|---|---|
| R10AD5F5AJ-CM1 AND D49723 | C/1 Advisory reference — outside the item-of-supply concept Hunt Valve Company, Inc. |
| MIL-DTL-24332 | 4/1 Identification reference U.S. Government activity |
| UCASNNSPSCCE | 5/9 Secondary reference Danco Valve Company |
| CASNN08SCE-A016 | 5/9 Secondary reference Danco Valve Company |
| DN60FF-171T209 | 5/9 Secondary reference Dante Valve Company |
| MIL-V-24332 | 5/9 Secondary reference U.S. Government activity |
| R10AD5F5AJ-CM1 AND D49723 | 3/9 Design control — primary reference Hunt Valve Company Inc Dba Union Flonetics |
| CASNN08SCE-A016 | C/1 Advisory reference — outside the item-of-supply concept Dante Valve Company |
| CASNN08SCE | 5/9 Secondary reference Danco Valve Company |
NSN 4820-01-177-8459 is a Valve,safety Relief, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-177-8459: Flow Control Device: DISK; Flange Shape: ROUND WITH HOLES ALL ENDS; Furnished Items and Quantity: 1 LEVER; Flange Face Design: RAISED STRAIGHT 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.