The Valve,regulating,fluid Pressure, cataloged under National Stock Number 4820-00-474-2255, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Eaton Aerospace, Llc Dba Jackson South. 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 | 4820-00-474-2255 |
| Primary Part Number | AA14521A |
| Item Name | Valve,regulating,fluid Pressure |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Eaton Aerospace, Llc Dba Jackson South |
| Status | ACTIVE |
| Valve Stem Design | SINGLE SEAT |
| FSC Application Data | HYDRAULIC SYSTEM,ACFT |
| First End Thread Direction | RIGHT-HAND |
| Second End Relationship with First End | IDENTICAL |
| Remote Actuation Method | PISTON |
| Body Style | TEE ANGLE |
| Regulation Type | AUTOMATIC DOUBLE STAGE |
| First End Thread Class | 3B |
| Third End Relationship with Preceding Ends | IDENTICAL WITH FIRST END |
| First End Style Designator | GASKET SEAL |
| Fourth End Connection Type | THREADED INTERNAL BOSS |
| End Connection Quantity | 4 |
| Outlet Pressure Range | 1250.0 TO 1550.0 CAMERA MOUNT |
| Fourth End Thread Direction | RIGHT-HAND |
| Fourth End Style Designator | GASKET SEAL |
| First End Connection Type | THREADED INTERNAL BOSS |
| Fourth End Relationship with Preceding Ends | NOT IDENTICAL WITH FIRST, SECOND OR THIRD END |
| Material | STEEL CORROSION RESISTING SEAT |
| Media for Which Designed | HYDROCARBON FUELS AND OILS |
| Maximum Inlet Pressure Rating | ERR-060 |
| Fourth End Thread Class | 3B |
| Thread Size and Series/type Designator | 3/4-16 UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END |
| Thread Size and Series/type Designator | 7/16-20 UNIFIED NATIONAL JOINT FINE (UNJF) FOURTH 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 |
|---|---|
| AA14521A PRIMARY | Eaton Aerospace, Llc Dba Jackson South (USA) |
NSN 4820-00-474-2255 is a Valve,regulating,fluid Pressure, manufactured by Eaton Aerospace, Llc Dba Jackson South, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-474-2255 has 1 manufacturer part number on file: AA14521A (Eaton Aerospace, Llc Dba Jackson South).
Key specifications for AA14521A: Valve Stem Design: SINGLE SEAT; FSC Application Data: HYDRAULIC SYSTEM,ACFT; First End Thread Direction: RIGHT-HAND; Second End Relationship with First End: IDENTICAL. 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.