The Valve,safety Relief, cataloged under National Stock Number 4820-01-311-0959, 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 Quick Coupler Division. Government technical data includes 14 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. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-311-0959 |
| Primary Part Number | 4986-11 |
| Item Name | Valve,safety Relief |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division |
| Status | ACTIVE |
| Style Designator | SCREW-IN CARTRIDGE |
| Opening Pressure Setting | 2200.0 POUNDS PER SQUARE INCH LBS |
| Nominal Thread Size | 1.000 INCHES ALL ENDS IN |
| Operating Pressure | 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | STEEL CORROSION RESISTING BODY |
| Flow Control Device | SPOOL |
| Valve Operation Method | AUTOMATIC |
| Thread Series Designator | UNS ALL ENDS |
| Thread Class | 2B ALL ENDS |
| Connection Style | PLAIN (PIPE) ALL ENDS |
| Thread Quantity Per Inch | 14 ALL ENDS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Connection Type | THREADED CARTRIDGE ALL ENDS |
| Valve Discharge Flow Rate | 50.0 GALLONS PER MINUTE |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 20554-1 | United States Department of the Navy Dba Naval Surface Warfare Center Panama City (USA) |
| 20554 | United States Department of the Navy Dba Naval Surface Warfare Center Panama City (USA) |
| 4986-11 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division (USA) |
NSN 4820-01-311-0959 is a Valve,safety Relief, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-311-0959 has 3 cross-referenced part numbers: 20554-1 (United States Department of the Navy Dba Naval Surface Warfare Center Panama City), 20554 (United States Department of the Navy Dba Naval Surface Warfare Center Panama City), 4986-11 (Parker-Hannifin Corporation Dba Pneutronics Div Quick Coupler Division).
There are 8 known substitutes for 4820-01-311-0959: 5330-00-285-9436, 6515-00-336-2900, 3020-00-573-1034 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 4986-11: Style Designator: SCREW-IN CARTRIDGE; Opening Pressure Setting: 2200.0 POUNDS PER SQUARE INCH LBS; Nominal Thread Size: 1.000 INCHES ALL ENDS IN; Operating Pressure: 5000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS. 14 total characteristics are documented in the Federal Logistics Information System.