The Valve,safety Relief, cataloged under National Stock Number 4820-00-529-4270, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Hydro-Aire Aerospace Corp. Government technical data includes 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-529-4270 |
| Primary Part Number | A20051 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Hydro-Aire Aerospace Corp |
| Status | ACTIVE |
| Opening Pressure Setting | 3700.0 POUNDS PER SQUARE INCH LBS |
| Nominal Thread Size | 0.437 INCHES ALL ENDS IN |
| Media for Which Designed | HYDRAULIC FLUID, PHOSPHATE-ESTER BASE SINGLE RESPONSE |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES ALL ENDS IN |
| Thread Series Designator | UNF ALL ENDS |
| Bonnet Type | INSIDE SCREW |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Connection Type | THREADED INTERNAL TUBE ALL ENDS |
| Operating Pressure | 4000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Disk Loading Method | SPRING |
| Flow Control Device | DISK |
| Connection Style | FLARE(TUBE) ALL ENDS |
| Thread Class | 3B ALL ENDS |
| Material | STEEL CORROSION RESISTING SEAT |
| Valve Operation Method | AUTOMATIC |
| Bonnet Attachment Method | INTEGRAL |
| Features Provided | PRESSURE TIGHT OUTLET SIDE |
| Material | ALUMINUM ALLOY BODY |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 3466651-511 | The Boeing Company (USA) |
| A20051 PRIMARY | Hydro-Aire Aerospace Corp (USA) |
| 3466651-511 | The Boeing Company (USA) |
NSN 4820-00-529-4270 is a Valve,safety Relief, manufactured by Hydro-Aire Aerospace Corp, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-529-4270 has 3 cross-referenced part numbers: 3466651-511 (The Boeing Company), A20051 (Hydro-Aire Aerospace Corp), 3466651-511 (The Boeing Company).
There is 1 known substitute for 4820-00-529-4270: 3510-01-162-4472. Verify interchangeability with system specifications before substitution.
Key specifications for A20051: Opening Pressure Setting: 3700.0 POUNDS PER SQUARE INCH LBS; Nominal Thread Size: 0.437 INCHES ALL ENDS IN; Media for Which Designed: HYDRAULIC FLUID, PHOSPHATE-ESTER BASE SINGLE RESPONSE; Style Designator: STRAIGHT THRU. 20 total characteristics are documented in the Federal Logistics Information System.