The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-424-9054, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Metrex Valve Corp. Dba Metrex Valve Corp. Government technical data includes 14 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 | 4820-01-424-9054 |
| Primary Part Number | MDFPMX-3170-3W |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Metrex Valve Corp. Dba Metrex Valve Corp |
| Status | ACTIVE |
| First End Bolt Hole Quantity | 8 |
| Second End Relationship with First End | IDENTICAL |
| Body Style | TEE |
| First End Flange Thickness | 0.938 INCHES NOMINAL IN |
| First End Flange Outside Diameter | 13.500 INCHES NOMINAL IN |
| Third End Relationship with Preceding Ends | IDENTICAL WITH FIRST END |
| First End Style Designator | PLAIN |
| First End Bolt Hole Diameter | 0.875 INCHES NOMINAL IN |
| First End Bolt Circle Diameter | 11.750 INCHES NOMINAL IN |
| End Connection Quantity | 3 |
| First End Connection Type | PLAIN FACE FLANGE |
| First End Flange Shape Style | ROUND W/ BOLT HOLES |
| Material | COPPER ALLOY BODY |
| Media for Which Designed | WATER |
| 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 |
|---|---|
| MDFPMX-3170-3W PRIMARY | Metrex Valve Corp. Dba Metrex Valve Corp (USA) |
NSN 4820-01-424-9054 is a Valve,regulating,fluid Pressure, manufactured by Metrex Valve Corp. Dba Metrex Valve Corp, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-424-9054 has 1 manufacturer part number on file: MDFPMX-3170-3W (Metrex Valve Corp. Dba Metrex Valve Corp).
1 possible match (shared part number, not a government interchangeability claim): 4820-01-438-6550. Verify interchangeability with system specifications before substitution.
Key specifications for MDFPMX-3170-3W: First End Bolt Hole Quantity: 8; Second End Relationship with First End: IDENTICAL; Body Style: TEE; First End Flange Thickness: 0.938 INCHES NOMINAL IN. 14 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.