The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-421-1643, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Zurn Industries Inc Wilkins Regulator Co Div. Government technical data includes 24 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-421-1643 |
| Primary Part Number | 500FC-2.00IN |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Zurn Industries Inc Wilkins Regulator Co Div |
| Status | ACTIVE |
| First End Bolt Hole Quantity | 4 |
| Flow Control Device | DISK |
| Second End Relationship with First End | IDENTICAL |
| Remote Actuation Method | DIAPHRAGM |
| Body Style | STRAIGHT THRU |
| Face to Face Distance | 10.400 INCHES NOMINAL IN |
| Regulation Type | AUTOMATIC SINGLE STAGE |
| First End Flange Thickness | 0.500 INCHES NOMINAL IN |
| First End Flange Outside Diameter | 6.000 INCHES NOMINAL IN |
| First End Style Designator | PLAIN |
| Temp Rating | 180.0 FAHRENHEIT NOMINAL DEGF |
| First End Bolt Hole Diameter | 0.750 INCHES NOMINAL IN |
| First End Bolt Circle Diameter | 4.750 INCHES NOMINAL IN |
| End Connection Quantity | 2 |
| Outlet Pressure Range | 25.0 TO 75.0 CAMERA MOUNT |
| Valve Loading Method | SPRING |
| First End Connection Type | PLAIN FACE FLANGE |
| First End Flange Shape Style | ROUND W/ BOLT HOLES |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING SEAT |
| Material | STEEL CORROSION RESISTING STEM |
| Media for Which Designed | WATER, SALT |
| Maximum Inlet Pressure Rating | ERR-060 |
| Filter | NOT INCLUDED |
| 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 |
|---|---|
| 500FC-2.00IN PRIMARY | Zurn Industries Inc Wilkins Regulator Co Div (USA) |
NSN 4820-01-421-1643 is a Valve,regulating,fluid Pressure, manufactured by Zurn Industries Inc Wilkins Regulator Co Div, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-421-1643 has 1 manufacturer part number on file: 500FC-2.00IN (Zurn Industries Inc Wilkins Regulator Co Div).
Key specifications for 500FC-2.00IN: First End Bolt Hole Quantity: 4; Flow Control Device: DISK; Second End Relationship with First End: IDENTICAL; Remote Actuation Method: DIAPHRAGM. 24 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.