The Valve,calibrated Flow, cataloged under National Stock Number 4820-01-396-7422, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Engineered Controls International, Llc. Government technical data includes 9 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. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-396-7422 |
| Primary Part Number | MF250B |
| Item Name | Valve,calibrated Flow |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Engineered Controls International, Llc |
| Status | ACTIVE |
| Flow Control Device | PISTON, SPRING LOADED |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| First End Style Designator | PLAIN |
| End Connection Quantity | 2 |
| First End Connection Type | THREADED EXTERNAL PIPE |
| Material | COPPER ALLOY BODY |
| Thread Size and Series/type Designator | 1/2-27 NPT FIRST END |
| 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 |
|---|---|
| MF250B PRIMARY | Engineered Controls International, Llc (USA) |
NSN 4820-01-396-7422 is a Valve,calibrated Flow, manufactured by Engineered Controls International, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-396-7422 has 1 manufacturer part number on file: MF250B (Engineered Controls International, Llc).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-398-2111. Verify interchangeability with system specifications before substitution.
Key specifications for MF250B: Flow Control Device: PISTON, SPRING LOADED; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU. 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.
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.