The Valve,check, cataloged under National Stock Number 4820-00-797-3959, 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 18 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. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-797-3959 |
| Primary Part Number | 448-8D27-65 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division |
| Status | ACTIVE |
| Style Designator | STRAIGHT THRU |
| Thread Class | 3A FIRST END A |
| Disk Loading Method | SPRING |
| Thread Direction | RIGHT-HAND FIRST END |
| Seat Angle | 24.0 DEGREES FIRST END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Nominal Outside Diameter Tube Accommodated | 0.500 INCHES FIRST END IN |
| Valve Operation Method | AUTOMATIC |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Flow Control Device | POPPET |
| Thread Series Designator | UNF FIRST END |
| Thread Quantity Per Inch | 16 FIRST END |
| Criticality Code Justification | FEAT |
| Nominal Thread Size | 0.750 INCHES FIRST END IN |
| Connection Style | FLARELESS FIRST END |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | ALUMINUM ALLOY SEAT |
| Material | ALUMINUM ALLOY BODY |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 448-8D27-65 PRIMARY | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
| 448-8D2-65 | Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit (USA) |
| 12-159-2 | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
| 50.109 | Mission Systems Davenport Inc. (USA) |
| 12-159-2 | Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit (USA) |
| VA041 | Hydraflow (USA) |
| VA039-1 | Hydraflow (USA) |
| VA021 | Hydraflow (USA) |
| 50.109-BN PRIMARY | Mission Systems Davenport Inc. (USA) |
NSN 4820-00-797-3959 is a Valve,check, manufactured by Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-797-3959 has 9 cross-referenced part numbers: 448-8D27-65 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division), 448-8D2-65 (Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit), 12-159-2 (Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division), 50.109 (Mission Systems Davenport Inc.), 12-159-2 (Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit) and 4 more.
There are 12 known substitutes for 4820-00-797-3959: 3455-00-009-0218, 6685-00-031-8371, 5330-00-119-7934 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 448-8D27-65: Style Designator: STRAIGHT THRU; Thread Class: 3A FIRST END A; Disk Loading Method: SPRING; Thread Direction: RIGHT-HAND FIRST END. 20 total characteristics are documented in the Federal Logistics Information System.