The Valve,check, cataloged under National Stock Number 4820-01-204-7927, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Control Devices, Incorporated. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-204-7927 |
| Primary Part Number | C5050 OEA |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Control Devices, Incorporated |
| Status | ACTIVE |
| Flow Control Device | DISK |
| Connection Style | FLARELESS SECOND END |
| Connection Style | PLAIN, OPTIONAL END (PIPE) FIRST END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED INTERNAL PIPE FIRST END |
| Connection Type | THREADED EXTERNAL TUBE SECOND END |
| Style Designator | ANGLE |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.687 INCHES SECOND END IN |
| Nominal Thread Size | 0.125 INCHES FIRST END IN |
| Seat Angle | 12.500 DEGREES SECOND END |
| Thread Class | 2A SECOND END A |
| Thread Quantity Per Inch | 20 SECOND END |
| Material | STEEL CORROSION RESISTING BODY |
| Thread Series Designator | UN SECOND END |
| Thread Series Designator | NPT FIRST END |
| 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 |
NSN 4820-01-204-7927 is a Valve,check, manufactured by Control Devices, Incorporated, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-204-7927 has 2 manufacturer part numbers on file: C5050 OEA (Control Devices, Incorporated), VV815 (Curtis-Toledo, Inc.).
Key specifications for C5050 OEA: Flow Control Device: DISK; Connection Style: FLARELESS SECOND END; Connection Style: PLAIN, OPTIONAL END (PIPE) FIRST END; Mounting Position: HORIZONTAL OR VERTICAL. 18 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.