The Valve,check, cataloged under National Stock Number 4820-00-155-5672, 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 30 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 7 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-155-5672 |
| Primary Part Number | 2C9640 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Crissair Inc Div Esco Technologies |
| Status | ACTIVE |
| Material | STEEL COMP 303 BODY |
| Material | STEEL COMP 440C FLOW CONTROL DEVICE |
| Material | STEEL COMP 303 SEAT |
| Thread Class | 3A ALL ENDS A |
| Valve Operation Method | AUTOMATIC |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Style | FLARELESS ALL ENDS |
| Disk Loading Method | SPRING |
| Material | STEEL COMP 303 SEAT |
| Surface Treatment Document and Classification | MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE |
| Nominal Thread Size | 0.562 INCHES FIRST END IN |
| Style Designator | STRAIGHT THRU |
| Surface Treatment | PASSIVATE |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Seat Angle | 12.0 DEGREES ALL ENDS |
| Thread Series Designator | UNF ALL ENDS |
| Material | STEEL COMP 440C FLOW CONTROL DEVICE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Surface Treatment Document and Classification | MIL-S-5002 MIL SPEC SINGLE TREATMENT RESPONSE |
| Surface Treatment | PASSIVATE |
| Maximum Operating Temp | 275.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Style Designator | STRAIGHT THRU |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Seat Angle | 12.0 DEGREES ALL ENDS |
| Thread Series Designator | UNF ALL ENDS |
| Media for Which Designed | HYDRAULIC FLUID, PETROLEUM BASE SINGLE RESPONSE |
| Nominal Thread Size | 0.438 INCHES SECOND END IN |
| Minimum Operating Temp | -65.0 FAHRENHEIT DEGF |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Flow Control Device | POPPET |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 2-43923-13 | Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems (USA) |
| 2-43923-13 | Ausco Inc (USA) |
| 2C9640 PRIMARY | Crissair Inc Div Esco Technologies (USA) |
| A1530 | Preece Inc Decca Valves Div (USA) |
| M4014-6-4 | Ausco Inc (USA) |
| 2-43923-13 | Northrop Grumman Systems Corporation (USA) |
| 2-43923-13 | Northrop Grumman Technical Services, Inc. Dba Defense Systems Sector (USA) |
NSN 4820-00-155-5672 is a Valve,check, manufactured by Crissair Inc Div Esco Technologies, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-155-5672 has 7 cross-referenced part numbers: 2-43923-13 (Northrop Grumman Systems Corporation Dba Northrop Grumman Is Div Northrop Grumman Aeronautics Systems), 2-43923-13 (Ausco Inc), 2C9640 (Crissair Inc Div Esco Technologies), A1530 (Preece Inc Decca Valves Div), M4014-6-4 (Ausco Inc) and 2 more.
There are 10 known substitutes for 4820-00-155-5672: 6230-00-170-7842, 1680-00-180-4618, 8455-00-408-2801 and 7 more. Verify interchangeability with system specifications before substitution.
Key specifications for 2C9640: Material: STEEL COMP 303 BODY; Material: STEEL COMP 440C FLOW CONTROL DEVICE; Material: STEEL COMP 303 SEAT; Thread Class: 3A ALL ENDS A. 30 total characteristics are documented in the Federal Logistics Information System.