The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-01-229-3989, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Parker-Hannifin Corporation Dba Pneumatic North America Div Pneumatics North America. 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. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-229-3989 |
| Primary Part Number | B548-01-DHC |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Parker-Hannifin Corporation Dba Pneumatic North America Div Pneumatics North America |
| Status | ACTIVE |
| Flow Control Device | DISK |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Body Style | STRAIGHT THRU |
| Regulation Type | AUTOMATIC SINGLE STAGE |
| First End Style Designator | PLAIN |
| Temp Rating | 40.0 FAHRENHEIT MINIMUM AND 120.0 FAHRENHEIT MAXIMUM DEGF |
| End Connection Quantity | 2 |
| Valve Loading Method | WEIGHT |
| First End Connection Type | THREADED INTERNAL PIPE |
| Material | ALUMINUM BODY |
| Maximum Inlet Pressure Rating | ERR-060 |
| Thread Size and Series/type Designator | 0.125-27 NPTF FIRST END |
| Filter | 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 |
|---|---|
| B548-01-DHC PRIMARY | Parker-Hannifin Corporation Dba Pneumatic North America Div Pneumatics North America (USA) |
NSN 4820-01-229-3989 is a Valve,regulating,fluid Pressure, manufactured by Parker-Hannifin Corporation Dba Pneumatic North America Div Pneumatics North America, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-229-3989 has 1 manufacturer part number on file: B548-01-DHC (Parker-Hannifin Corporation Dba Pneumatic North America Div Pneumatics North America).
Key specifications for B548-01-DHC: Flow Control Device: DISK; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL; Body Style: STRAIGHT THRU. 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.