The Valve,check, cataloged under National Stock Number 4820-00-223-5857, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Clayton Manufacturing Company. Government technical data includes 14 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 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: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-223-5857 |
| Primary Part Number | 1-2INSTMDISC |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Clayton Manufacturing Company |
| Status | ACTIVE |
| Valve Operation Method | AUTOMATIC |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS |
| Operating Pressure | 125.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM FIRST RESPONSE LBS |
| Thread Series Designator | NPT ALL ENDS |
| Media for Which Designed | STEAM FIRST RESPONSE |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Media for Which Designed | WATER-OIL-GAS SECOND RESPONSE |
| Material | COPPER ALLOY 836 BODY |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Flow Control Device | DISK |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 1-2INSTMDISC PRIMARY | Clayton Manufacturing Company (USA) |
| 50338 | Ohio Brass Co (USA) |
NSN 4820-00-223-5857 is a Valve,check, manufactured by Clayton Manufacturing Company, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-223-5857 has 2 cross-referenced part numbers: 1-2INSTMDISC (Clayton Manufacturing Company), 50338 (Ohio Brass Co).
There are 8 known substitutes for 4820-00-223-5857: 6532-00-493-3767, 5999-00-636-7940, 2940-00-821-8475 and 5 more. Verify interchangeability with system specifications before substitution.
Key specifications for 1-2INSTMDISC: Valve Operation Method: AUTOMATIC; Thread Direction: RIGHT-HAND ALL ENDS; Style Designator: STRAIGHT THRU; Operating Pressure: 200.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SECOND RESPONSE LBS. 14 total characteristics are documented in the Federal Logistics Information System.