The Valve,calibrated Flow, cataloged under National Stock Number 4820-00-457-1607, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Brand Hydraulics. Government technical data includes 15 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-00-457-1607 |
| Primary Part Number | B50 |
| Item Name | Valve,calibrated Flow |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Brand Hydraulics |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Renewable Seat Ring Type | THREADED |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Body Style | TEE |
| Third End Relationship with Preceding Ends | IDENTICAL WITH FIRST END |
| First End Style Designator | PLAIN |
| End Connection Quantity | 3 |
| First End Connection Type | THREADED INTERNAL PIPE |
| Material | STEEL FLOW CONTROL DEVICE |
| Material | IRON CAST BODY |
| Media for Which Designed | HYDRAULIC OIL |
| Maximum Inlet Pressure Rating | ERR-060 |
| Thread Size and Series/type Designator | 0.375-18 NPT FIRST END |
| Valve Discharge Flow Rate | 8.0 GALLONS PER MINUTE |
| 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 |
|---|---|
| B50 PRIMARY | Brand Hydraulics (USA) |
| Reference | Meaning |
|---|---|
| 231-6694 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-457-1607 is a Valve,calibrated Flow, manufactured by Brand Hydraulics, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-457-1607 has 1 manufacturer part number on file: B50 (Brand Hydraulics).
Key specifications for B50: Flow Control Device: POPPET; Renewable Seat Ring Type: THREADED; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL. 15 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.