The Valve,check, cataloged under National Stock Number 4820-00-903-1126, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Crissair Inc Div Esco Technologies. Government technical data includes 19 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 11 commercial cross-references from 9 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 | 4820-00-903-1126 |
| Primary Part Number | 2C4312 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Crissair Inc Div Esco Technologies |
| Status | CANCELLED |
| Flow Control Device | POPPET |
| Media for Which Designed | HYDRAULIC FLUID, PHOSPHATE-ESTER BASE SINGLE RESPONSE |
| Mounting Position | HORIZONTAL |
| Thread Class | 3A ALL ENDS A |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Surface Treatment | PASSIVATE |
| Style Designator | STRAIGHT THRU |
| Material | STEEL CORROSION RESISTING OVERALL |
| Seat Angle | 12.0 DEGREES ALL ENDS |
| Maximum Operating Temp | 450.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Disk Loading Method | SPRING |
| Valve Operation Method | AUTOMATIC |
| Thread Series Designator | UNF ALL ENDS |
| Connection Style | FLARELESS ALL ENDS |
| Opening Pressure Setting | 5.0 POUNDS PER SQUARE INCH LBS |
| Test Data Document | 96906-MS24593 STANDARD (INCLUDES INDUSTRY OR ASSOCIATION STANDARDS, INDIVIDUAL MANUFACTUREER STANDARDS, ETC.). |
| Nominal Thread Size | 1.062 INCHES ALL ENDS IN |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 2C4312 | Crissair Inc Div Esco Technologies (USA) |
| J417A-12SS-5 | Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit (USA) |
| 4820009031126 | E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| 417-12SS5 | Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit (USA) |
| M25675-12 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| J417A-12SS-5 | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
| 513-50049 | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Pump Division (USA) |
| 4820009031126 | E.c.a Etablissement Centrald'approvisionnement Des Forces Armee |
| 417-122SS2 | Curtiss-Wright Flow Control Corporation Dba Farris Engineering Div Curtiss-Wright Valves Division- Farris (USA) |
| MS24423-12 | Military Standards Promulgated by Military Departments 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 |
NSN 4820-00-903-1126 is a Valve,check, manufactured by Crissair Inc Div Esco Technologies, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-903-1126 has 11 cross-referenced part numbers: 2C4312 (Crissair Inc Div Esco Technologies), J417A-12SS-5 (Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit), 4820009031126 (E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales), 417-12SS5 (Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit), M25675-12 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M) and 6 more.
There are 12 known substitutes for 4820-00-903-1126: 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 2C4312: Flow Control Device: POPPET; Media for Which Designed: HYDRAULIC FLUID, PHOSPHATE-ESTER BASE SINGLE RESPONSE; Mounting Position: HORIZONTAL; Thread Class: 3A ALL ENDS A. 19 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-903-1126 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.