The Valve,check, cataloged under National Stock Number 4820-00-421-5838, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-421-5838 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | UNTHREADED CARTRIDGE ALL ENDS |
| Style Designator | STRAIGHT THRU DROP-IN CARTRIDGE |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Maximum Operating Temp | 275.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Disk Loading Method | SPRING |
| Surface Treatment | ANODIZE |
| Material | STEEL FLOW CONTROL DEVICE |
| Material | ALUMINUM SEAT |
| 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 |
| Reference | Meaning |
|---|---|
| 3185611 | 7/2 Vendor item drawing reference Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) |
| 3185611 | 5/9 Secondary reference Allied-Signal Inc Dba Allied-Signal Aerospace Co Electrodynamics Div |
| 2C9540 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-421-5838 is a Valve,check, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-421-5838: Flow Control Device: POPPET; Mounting Position: HORIZONTAL OR VERTICAL; Connection Type: UNTHREADED CARTRIDGE ALL ENDS; Style Designator: STRAIGHT THRU DROP-IN CARTRIDGE. 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.