The Valve,check, cataloged under National Stock Number 4820-00-424-4432, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Lunkenheimer Co. Government technical data includes 21 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 5 commercial cross-references from 2 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.
| Parameter | Value |
|---|---|
| NSN | 4820-00-424-4432 |
| Primary Part Number | 416 1/4 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Lunkenheimer Co |
| Status | CANCELLED |
| Material | STEEL CORROSION RESISTING FLOW CONTROL DEVICE |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Maximum Operating Temp | 550.0 FAHRENHEIT FIRST RESPONSE DEGF |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Mounting Position | HORIZONTAL |
| Nominal Thread Size | 0.250 INCHES ALL ENDS IN |
| Thread Series Designator | NPT ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Material | COPPER ALLOY 922 SEAT |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Material | COPPER ALLOY 922 BODY |
| Material Document and Classification | QQ-C-390,ALLOY D4 FED SPEC SINGLE MATERIAL RESPONSE SEAT |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Operating Pressure | 400.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Reference Number Differentiating Characteristics | AS DIFFERENTIATED BY VALVE SIZE |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Flow Control Device | BALL |
| Valve Operation Method | AUTOMATIC |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Maximum Operating Temp | 150.0 FAHRENHEIT SECOND RESPONSE DEGF |
| Material Document and Classification | QQ-C-290,ALLOY D4 FED SPEC SINGLE MATERIAL RESPONSE BODY |
| Acquisition Status | CANCELLED |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 416 1/4 | Lunkenheimer Co (USA) |
| MD3993 | Mwm-Murphy Diesel Co (USA) |
| 416 | Lunkenheimer Co (USA) |
| FIG416SIZE1-4 | Lunkenheimer Co (USA) |
| 416200 | Lunkenheimer Co (USA) |
NSN 4820-00-424-4432 is a Valve,check, manufactured by Lunkenheimer Co, classified under FSC 4820 (No Item Name Available). Status: cancelled.
NSN 4820-00-424-4432 has 5 cross-referenced part numbers: 416 1/4 (Lunkenheimer Co), MD3993 (Mwm-Murphy Diesel Co), 416 (Lunkenheimer Co), FIG416SIZE1-4 (Lunkenheimer Co), 416200 (Lunkenheimer Co).
There are 8 known substitutes for 4820-00-424-4432: 6145-00-164-6865, 4920-00-547-1697, 5950-00-628-2014 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 416 1/4: Material: STEEL CORROSION RESISTING FLOW CONTROL DEVICE; Thread Direction: RIGHT-HAND ALL ENDS; Maximum Operating Temp: 550.0 FAHRENHEIT FIRST RESPONSE DEGF; Connection Type: THREADED INTERNAL PIPE ALL ENDS. 21 total characteristics are documented in the Federal Logistics Information System.
NSN 4820-00-424-4432 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.