The Valve,check, cataloged under National Stock Number 4820-00-494-8174, 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 20 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 12 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: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-494-8174 |
| Primary Part Number | 4C2112 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Crissair Inc Div Esco Technologies |
| Status | ACTIVE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Nominal Outside Diameter Tube Accommodated | 1.000 INCHES FIRST END IN |
| Maximum Operating Temp | 450.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Flow Control Device | POPPET |
| Disk Loading Method | SPRING |
| Connection Style | EXTERNAL SEAT FOR GASKET SEAL (BOSS) ALL ENDS |
| Nondefinitive Spec/std Data | 3 TYPE AND 0.750 SIZE |
| Style Designator | STRAIGHT THRU |
| Surface Treatment | PASSIVATE |
| Nominal Thread Size | 1.062 INCHES ALL ENDS IN |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Thread Series Designator | UN ALL ENDS |
| Media for Which Designed | HYDRAULIC FLUID, MINERAL BASE SINGLE RESPONSE |
| Connection Type | THREADED EXTERNAL BOSS ALL ENDS |
| Thread Quantity Per Inch | 12 ALL ENDS |
| Material | STEEL CORROSION RESISTING OVERALL |
| Specification/standard Data | 81349-MIL-V-25675B GOVERNMENT SPECIFICATION |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Valve Operation Method | AUTOMATIC |
| Thread Class | 3A ALL ENDS A |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 4C2112 | Crissair Inc Div Esco Technologies (USA) |
| 332-2076-060 | Rockwell Collins, Inc. Div Collins Aerospace - Mission Systems (USA) |
| 4820004948174 | E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales |
| MS24593-12 | 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 |
| MIL-V-25675B | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 332-2076-060 | Rockwell Collins, Inc. Dba Collins Aerospace Government Systems Div Collins Aerospace - Government Systems (USA) |
| 25675-F12 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| 416-12SS1 | Teledyne Industries Inc Teledyne Fluid Systems Republic Business Unit (USA) |
| M25675-F12 | Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M |
| J416A-12SS-5 | Parker-Hannifin Corporation Dba Pneutronics Div Hydraulic Valve Division (USA) |
| MS2459312 | Hanwha Defense Australia Pty Ltd (AUS) |
NSN 4820-00-494-8174 is a Valve,check, manufactured by Crissair Inc Div Esco Technologies, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-494-8174 has 12 cross-referenced part numbers: 4C2112 (Crissair Inc Div Esco Technologies), 332-2076-060 (Rockwell Collins, Inc. Div Collins Aerospace - Mission Systems), 4820004948174 (E.c.a Etablissement Central Des Approvisionnements Des Forces Armees Royales), MS24593-12 (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) and 7 more.
There are 12 known substitutes for 4820-00-494-8174: 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 4C2112: Thread Direction: RIGHT-HAND ALL ENDS; Nominal Outside Diameter Tube Accommodated: 1.000 INCHES FIRST END IN; Maximum Operating Temp: 450.0 FAHRENHEIT SINGLE RESPONSE DEGF; Flow Control Device: POPPET. 20 total characteristics are documented in the Federal Logistics Information System.