The Valve,flow Control, cataloged under National Stock Number 4820-01-450-2041, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Humphrey Products Co. 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-450-2041 |
| Primary Part Number | 250A-3-10-20 |
| Item Name | Valve,flow Control |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Humphrey Products Co |
| Status | ACTIVE |
| Connection Type | THREADED INTERNAL PIPE |
| End Connection Quantity | 4 |
| Nominal Thread Size | 0.125 INCHES AND 0.250 INCHES IN |
| Body Material | STEEL AND COPPER ALLOY |
| Thread Series Designator | NPT |
| 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 |
|---|---|
| 250A-3-10-20 PRIMARY | Humphrey Products Co (USA) |
| Reference | Meaning |
|---|---|
| 9310C3411-001 | D/9 Drawing number reference only The Entwistle Company Llc |
NSN 4820-01-450-2041 is a Valve,flow Control, manufactured by Humphrey Products Co, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-450-2041 has 1 manufacturer part number on file: 250A-3-10-20 (Humphrey Products Co).
Key specifications for 250A-3-10-20: Connection Type: THREADED INTERNAL PIPE; End Connection Quantity: 4; Nominal Thread Size: 0.125 INCHES AND 0.250 INCHES IN; Body Material: STEEL AND COPPER ALLOY. 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.