The Valve,check, cataloged under National Stock Number 4820-01-373-0078, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Kepner Products Co Div Kepner Products Company. Government technical data includes 15 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. 1 verified substitute exists in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-373-0078 |
| Primary Part Number | 404B-1 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Kepner Products Co Div Kepner Products Company |
| Status | ACTIVE |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | COPPER ALLOY BODY |
| Thread Series Designator | NPTF ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Media for Which Designed | WATER, FRESH SECOND RESPONSE |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Media for Which Designed | AIR FIRST RESPONSE |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Opening Pressure Setting | 2.0 POUNDS PER SQUARE INCH LBS |
| Maximum Operating Temp | 300.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Valve Operation Method | AUTOMATIC |
| Flow Control Device | DISK |
| Nominal Thread Size | 0.125 INCHES ALL ENDS IN |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
NSN 4820-01-373-0078 is a Valve,check, manufactured by Kepner Products Co Div Kepner Products Company, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-373-0078 has 2 cross-referenced part numbers: 6558562 (Naval Sea Systems Command), 404B-1 (Kepner Products Co Div Kepner Products Company).
There is 1 known substitute for 4820-01-373-0078: 5315-00-045-2563. Verify interchangeability with system specifications before substitution.
Key specifications for 404B-1: Operating Pressure: 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS; Material: COPPER ALLOY BODY; Thread Series Designator: NPTF ALL ENDS; Style Designator: STRAIGHT THRU. 15 total characteristics are documented in the Federal Logistics Information System.