The Valve,check, cataloged under National Stock Number 4820-00-903-3755, 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. Government technical data includes 17 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 18 commercial cross-references from 11 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-903-3755 |
| Primary Part Number | 1112-589970 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Parker-Hannifin Corporation Dba Pneutronics |
| Status | CANCELLED |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Operation Method | AUTOMATIC |
| Maximum Operating Temp | 450.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | STEEL CORROSION RESISTING BODY |
| Disk Loading Method | SPRING |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Style | FLARELESS ALL ENDS |
| Flow Control Device | POPPET |
| Seat Angle | 12.0 DEGREES FIRST END |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Nominal Thread Size | 0.562 INCHES ALL ENDS IN |
| Thread Class | 3A FIRST END A |
| Test Data Document | 81349-MIL-V-25675 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |
| Thread Series Designator | UNF ALL ENDS |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 1112-589970 | Parker-Hannifin Corporation Dba Pneutronics (USA) |
| 417-6SS | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris (USA) |
| 1112-589970 | Federal Industries, Inc. Dba United Valve Company (USA) |
| 417-6SS-0062 | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris (USA) |
| 4820PL1660222 | Jednolity Indeks Materialowy - Uniform Material Index (POL) |
| 417-6SS5-0106 | Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit (USA) |
| 513-50032 | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division (USA) |
| 417-6SS5-0100 | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris (USA) |
| 417-6SS-0102 | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris (USA) |
| 417-6-SS-5 | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris (USA) |
| 98644-6 | Saf Industries Llc Dba Saf Industries Llc Div Garkenyon (USA) |
| MIL-V-25675 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| MIL-PRF-25675 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| M25675-6 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| MS24423-6 | Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M |
| 2C4360 | Crissair Inc Div Esco Technologies (USA) |
| 417-6SS5 | Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit (USA) |
| J417A-6SS-5 | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
NSN 4820-00-903-3755 is a Valve,check, manufactured by Parker-Hannifin Corporation Dba Pneutronics, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-903-3755 has 18 cross-referenced part numbers: 1112-589970 (Parker-Hannifin Corporation Dba Pneutronics), 417-6SS (Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris), 1112-589970 (Federal Industries, Inc. Dba United Valve Company), 417-6SS-0062 (Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris), 4820PL1660222 (Jednolity Indeks Materialowy - Uniform Material Index) and 13 more.
There are 12 known substitutes for 4820-00-903-3755: 4820-00-045-7414, 4820-00-045-7415, 4820-00-121-1964 and 9 more. Verify interchangeability with system specifications before substitution.
Key specifications for 1112-589970: Thread Direction: RIGHT-HAND ALL ENDS; Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Valve Operation Method: AUTOMATIC; Maximum Operating Temp: 450.0 FAHRENHEIT SINGLE RESPONSE DEGF. 17 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-903-3755 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.