The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-491-6392, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Veriflo Division. Government technical data includes 18 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-491-6392 |
| Primary Part Number | IR502B4MK |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Veriflo Division |
| Status | ACTIVE |
| Flow Control Device | DIAPHRAGM |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Body Style | TEE |
| Regulation Type | 1ST STAGE MANUAL, 2ND STAGE AUTOMATIC |
| Third End Relationship with Preceding Ends | IDENTICAL WITH FIRST END |
| First End Style Designator | PLAIN |
| Temp Rating | -40.0 FAHRENHEIT MINIMUM AND 165.0 FAHRENHEIT MAXIMUM DEGF |
| End Connection Quantity | 3 |
| Outlet Pressure Range | 5.0 TO 300.0 CAMERA MOUNT |
| Manual Control Method | KNOB |
| Valve Loading Method | SPRING |
| First End Connection Type | THREADED INTERNAL PIPE |
| Material | BRASS SEAT |
| Media for Which Designed | NITROGEN, GASEOUS |
| Maximum Inlet Pressure Rating | ERR-060 |
| Thread Size and Series/type Designator | 1/4-18 NPT FIRST END |
| 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 |
|---|---|
| IR502B4MK PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Veriflo Division (USA) |
| Reference | Meaning |
|---|---|
| 991738-1 | 5/2 Secondary reference U.S. Government activity |
| 991738 | 7/2 Vendor item drawing reference U.S. Government activity |
NSN 4820-00-491-6392 is a Valve,regulating,fluid Pressure, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Veriflo Division, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-491-6392 has 1 manufacturer part number on file: IR502B4MK (Parker-Hannifin Corporation Dba Pneutronics Div Veriflo Division).
Key specifications for IR502B4MK: Flow Control Device: DIAPHRAGM; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL; Body Style: TEE. 18 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.