The Valve,check, cataloged under National Stock Number 4820-01-154-6435, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Boeing Company Div Defense. Government technical data includes 6 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-01-154-6435 |
| Primary Part Number | ST7M447-2 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Boeing Company Div Defense |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Operating Pressure | 180.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | -65.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Maximum Operating Temp | 220.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Material | ALUMINUM 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 |
|---|---|
| ST7M447-2 | The Boeing Company Div Defense (USA) |
| Reference | Meaning |
|---|---|
| 10124660 | 6/9 Informative reference only Nimikkeistokeskus Ncb Finland |
| 1C1084-1 | 3/2 Design control — primary reference U.S. Government activity |
| ST7M447 | D/9 Drawing number reference only The Boeing Company Div Defense |
NSN 4820-01-154-6435 is a Valve,check, manufactured by The Boeing Company Div Defense, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-154-6435 has 1 manufacturer part number on file: ST7M447-2 (The Boeing Company Div Defense).
Key specifications for ST7M447-2: Flow Control Device: POPPET; Operating Pressure: 180.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Maximum Operating Temp: -65.0 FAHRENHEIT FIRST RESPONSE DEGF; Maximum Operating Temp: 220.0 FAHRENHEIT SECOND RESPONSE DEGF. 6 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.