The Valve,flow Control, cataloged under National Stock Number 4820-01-421-9703, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 9 specifications, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-421-9703 |
| Item Name | Valve,flow Control |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Disk Material | STEEL COMP 304 |
| Flow Control Device | PISTON |
| Body Material Document and Classification | QQ-S-763,COMP 304 FED SPEC SINGLE MATERIAL RESPONSE |
| Disk Material Document and Classification | QQ-S-763,COMP 304 FED SPEC SINGLE MATERIAL RESPONSE |
| End Connection Quantity | 2 |
| Valve Size | 0.187 INCHES IN |
| Body Material | STEEL COMP 304 |
| Pressure Class | ERR-060 |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL Q — CCL Item — Commerce Control List |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| FCFX0503000B | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-421-9703 is a Valve,flow Control, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-421-9703: Disk Material: STEEL COMP 304; Flow Control Device: PISTON; Body Material Document and Classification: QQ-S-763,COMP 304 FED SPEC SINGLE MATERIAL RESPONSE; Disk Material Document and Classification: QQ-S-763,COMP 304 FED SPEC SINGLE MATERIAL RESPONSE. 9 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.
NSN 4820-01-421-9703 has DEMIL Code Q. Demilitarization may be required before disposal or transfer to non-military entities.
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.