The Valve,check, cataloged under National Stock Number 4820-00-153-8836, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Hawker Pacific Aerospace Landing Gear and Components Mfg and Repair. Government technical data includes 28 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-153-8836 |
| Primary Part Number | 2637-3 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Hawker Pacific Aerospace Landing Gear and Components Mfg and Repair |
| Status | ACTIVE |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Material | STEEL COMP 303 BODY |
| Maximum Operating Temp | 275.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Connection Style | FLARELESS ALL ENDS |
| Minimum Operating Temp | -65.0 FAHRENHEIT DEGF |
| Nominal Thread Size | 0.548 INCHES SECOND END IN |
| Valve Operation Method | AUTOMATIC |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Flow Control Device | POPPET |
| Surface Treatment | PASSIVATE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| Material | STEEL COMP 303 BODY |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Style Designator | STRAIGHT THRU |
| Surface Treatment | PASSIVATE |
| Seat Angle | 12.0 DEGREES ALL ENDS |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Seat Angle | 12.0 DEGREES ALL ENDS |
| Disk Loading Method | SPRING |
| Thread Series Designator | UNIFIED NATIONAL JOINT FINE (UNJF) ALL ENDS |
| Nominal Thread Size | 0.548 INCHES SECOND END IN |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Style Designator | STRAIGHT THRU |
| Thread Class | 3A ALL ENDS A |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 6-43937-3 | Northrop Grumman Systems Corporation (USA) |
| 6-43937-3 | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| 6-43937-3 | Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector (USA) |
| 2637-3 PRIMARY | Hawker Pacific Aerospace Landing Gear and Components Mfg and Repair (USA) |
| A3038-3 | Preece Inc Decca Valves Div (USA) |
NSN 4820-00-153-8836 is a Valve,check, manufactured by Hawker Pacific Aerospace Landing Gear and Components Mfg and Repair, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-153-8836 has 5 cross-referenced part numbers: 6-43937-3 (Northrop Grumman Systems Corporation), 6-43937-3 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), 6-43937-3 (Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector), 2637-3 (Hawker Pacific Aerospace Landing Gear and Components Mfg and Repair), A3038-3 (Preece Inc Decca Valves Div).
There are 8 known substitutes for 4820-00-153-8836: 5340-00-217-1105, 2940-00-221-5791, 2530-00-970-3444 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 2637-3: Media for Which Designed: HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE; Material: STEEL COMP 303 BODY; Maximum Operating Temp: 275.0 FAHRENHEIT SINGLE RESPONSE DEGF; Connection Style: FLARELESS ALL ENDS. 28 total characteristics are documented in the Federal Logistics Information System.