The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-944-2578, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Tactair Fluid Controls Inc. Government technical data includes 24 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog.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 | 4820-00-944-2578 |
| Primary Part Number | 26C26601 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Tactair Fluid Controls Inc |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Body Style | TEE |
| Regulation Type | MANUAL SINGLE STAGE |
| First End Thread Class | 3B |
| Third End Relationship with Preceding Ends | IDENTICAL WITH FIRST END |
| First End Style Designator | GASKET SEAL |
| Temp Rating | -65.0 FAHRENHEIT MINIMUM AND 275.0 FAHRENHEIT MAXIMUM DEGF |
| End Connection Quantity | 3 |
| Outlet Pressure Range | 670.0 TO 830.0 CAMERA MOUNT |
| Manual Control Method | SCREW |
| Valve Loading Method | SPRING |
| Mounting Facility | FLANGE |
| First End Connection Type | THREADED INTERNAL BOSS |
| Surface Treatment | ANODIZE OUTSIDE |
| Material | STEEL COMP 416SE FLOW CONTROL DEVICE |
| Material | STEEL CORROSION RESISTING SEAT |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE |
| Maximum Inlet Pressure Rating | ERR-060 |
| Center to Center Distance | 0.900 INCHES NOMINAL IN |
| Thread Size and Series/type Designator | 9/16-18 UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END |
| Filter | NOT INCLUDED |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY P/N 114HS102-1,FSCM 81205 |
| 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 |
|---|---|
| 26C26601 | Tactair Fluid Controls Inc (USA) |
| 114HS102-1 | The Boeing Company (USA) |
| Reference | Meaning |
|---|---|
| 26C26601 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-00-944-2578 is a Valve,regulating,fluid Pressure, manufactured by Tactair Fluid Controls Inc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-944-2578 has 2 manufacturer part numbers on file: 26C26601 (Tactair Fluid Controls Inc), 114HS102-1 (The Boeing Company).
Key specifications for 26C26601: Flow Control Device: POPPET; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL; Body Style: TEE. 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.