The Valve,check, cataloged under National Stock Number 4820-01-514-1735, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Fmc Technologies Inc Dba Fmc Fluid Control. Government technical data includes 12 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-514-1735 |
| Primary Part Number | P511021 REV A ITEM 20 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Fmc Technologies Inc Dba Fmc Fluid Control |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Minimum Operating Temp | -40.0 FAHRENHEIT DEGF |
| Connection Type | THREADED INTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL PIPE FIRST END |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 3500.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 250.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Material | STEEL FLOW CONTROL DEVICE |
| Material | ALUMINUM BODY |
| Opening Pressure Setting | 50.0 POUNDS PER SQUARE INCH LBS |
| 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 |
|---|---|
| P511021 REV A ITEM 20 | Fmc Technologies Inc Dba Fmc Fluid Control (USA) |
| P511028 | Fmc Technologies Inc Dba Fmc Fluid Control (USA) |
| Reference | Meaning |
|---|---|
| 10312-806-50 | 3/9 Design control — primary reference Vonberg Valve, Inc. |
NSN 4820-01-514-1735 is a Valve,check, manufactured by Fmc Technologies Inc Dba Fmc Fluid Control, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-514-1735 has 2 manufacturer part numbers on file: P511021 REV A ITEM 20 (Fmc Technologies Inc Dba Fmc Fluid Control), P511028 (Fmc Technologies Inc Dba Fmc Fluid Control).
Key specifications for P511021 REV A ITEM 20: Flow Control Device: POPPET; Minimum Operating Temp: -40.0 FAHRENHEIT DEGF; Connection Type: THREADED INTERNAL PIPE SECOND END; Connection Type: THREADED EXTERNAL PIPE FIRST END. 12 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.