The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-409-1735, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 28 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-409-1735 |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Flow Control Device | POPPET |
| Second End Seat Angle in Deg | 37.0 |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | NOT IDENTICAL |
| Second End Thread Class | 3A A |
| Body Style | STRAIGHT THRU |
| Regulation Type | AUTOMATIC SINGLE STAGE |
| First End Seat Angle in Deg | 37.0 |
| First End Thread Class | 3A A |
| First End Style Designator | FLARED |
| Temp Rating | -65.0 FAHRENHEIT MINIMUM AND 270.0 FAHRENHEIT MAXIMUM DEGF |
| End Connection Quantity | 2 |
| Second End Thread Direction | RIGHT-HAND |
| Valve Loading Method | SPRING |
| Mounting Facility | BRACKET |
| Second End Style Designator | FLARED |
| First End Connection Type | THREADED EXTERNAL TUBE |
| First End Outside Diameter Tube Accommodated | 0.500 INCHES NOMINAL IN |
| Material | ALUMINUM AND BRONZE SEAT |
| Media for Which Designed | AIR |
| Maximum Inlet Pressure Rating | ERR-060 |
| Second End Connection Type | THREADED EXTERNAL TUBE |
| Thread Size and Series/type Designator | 9/16-18 UNF SECOND END |
| Thread Size and Series/type Designator | 3/4-16 UNF FIRST END |
| Outlet Pressure Setting | ERR-060 |
| Filter | INCLUDED |
| Second End Outside Diameter Tube Accommodated | 0.375 INCHES NOMINAL IN |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY THE SOURCE CONTROL DWG NO. |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL D — Destroy Item |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 898476-2-1 | Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road) (USA) |
| A51E9056-1 | Northrop Grumman Systems Corporation (USA) |
| Reference | Meaning |
|---|---|
| A51E9056-1 | 5/9 Secondary reference Northrop Grumman Systems Corporation Dba Northrop Grumman Systems Corp Div Northrop Grumman Aeronautics Systems |
| 898476-2-1 | 3/3 Design control — primary reference U.S. Government activity |
| A51E9056-1 | C/1 Advisory reference — outside the item-of-supply concept Northrop Grumman Systems Corporation |
NSN 4820-00-409-1735 is a Valve,regulating,fluid Pressure, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-409-1735 has 2 manufacturer part numbers on file: 898476-2-1 (Honeywell International Inc. Dba Honeywell International Div Aerospace - Tempe (west Warner Road)), A51E9056-1 (Northrop Grumman Systems Corporation).
Key specifications for 4820-00-409-1735: Flow Control Device: POPPET; Second End Seat Angle in Deg: 37.0; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: NOT IDENTICAL. 28 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.
NSN 4820-00-409-1735 has DEMIL Code D. Demilitarization may be required before disposal or transfer to non-military entities.
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.