The Valve,restrictor Check, cataloged under National Stock Number 4820-01-013-9721, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division. Government technical data includes 24 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 9 commercial cross-references from 4 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-01-013-9721 |
| Primary Part Number | 8-1254-4 |
| Item Name | Valve,restrictor Check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division |
| Status | CANCELLED |
| Renewable Seat Ring Type | PRESSED-IN |
| Valve Operation Method | AUTOMATIC |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Disk Loading Method | SPRING |
| Material | COPPER ALLOY 360 BODY |
| Thread Series Designator | NPT ALL ENDS |
| Operating Pressure | 1000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material Document and Classification | QQ-B-626,ALLOY 360 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Furnished Items and Quantity | 1 NUT |
| Style Designator | STRAIGHT THRU |
| Media for Which Designed | AIR FIRST RESPONSE |
| Supplementary Features | ADDITIONAL FLOW CONTROL DEVICE: STEM |
| Media for Which Designed | HELIUM FOURTH RESPONSE |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Material Document and Classification | MIL-G-1149,TYPE 2,CLASS 5 MIL SPEC SINGLE MATERIAL RESPONSE PACKING |
| Material | RUBBER BUTADIENE-ACRYLONITRILE CLASS NBR PACKING |
| Media for Which Designed | FUEL/OIL, HYDROCARBON THIRD RESPONSE |
| Flow Control Device | DISK |
| Aperture Diameter | 0.120 INCHES NOMINAL IN |
| Media for Which Designed | BUTANE SECOND RESPONSE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Mounting Position | HORIZONTAL |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 410 1-4 | Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit (USA) |
| 1656341REVD | Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit (USA) |
| 1656341 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 410-1-4B2 | Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit (USA) |
| 8-1254-4 | Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit (USA) |
| 8-1254-4 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
| 1656341 PRIMARY | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris (USA) |
| BUWEPSDWG1656341 | Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier (USA) |
| 1-1256-1-1/4IPT | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris (USA) |
NSN 4820-01-013-9721 is a Valve,restrictor Check, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-01-013-9721 has 9 cross-referenced part numbers: 410 1-4 (Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit), 1656341REVD (Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit), 1656341 (Navair and Navsea Managed Original Design Activity Dwg Not Material/parts Supplier), 410-1-4B2 (Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit), 8-1254-4 (Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit) and 4 more.
There are 9 known substitutes for 4820-01-013-9721: 5895-00-223-8995, 1660-00-670-4218, 5961-01-031-2001 and 6 more. Verify interchangeability with system specifications before substitution.
Key specifications for 8-1254-4: Renewable Seat Ring Type: PRESSED-IN; Valve Operation Method: AUTOMATIC; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Disk Loading Method: SPRING. 25 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-01-013-9721 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.