The Valve,check, cataloged under National Stock Number 4820-00-203-2548, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Naval Sea Systems Command. Government technical data includes 25 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 23 commercial cross-references from 6 manufacturers, enabling identification through both NSN and commercial part number lookups. 11 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-203-2548 |
| Primary Part Number | LST1S4200-253069PC151 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Naval Sea Systems Command |
| Status | ACTIVE |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Material | COPPER ALLOY SEAT |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Connection Style | PLAIN, OPTIONAL END (PIPE) ALL ENDS |
| Mounting Position | HORIZONTAL |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Material | COPPER ALLOY STEM |
| Flow Control Device | DISK |
| Valve Operation Method | AUTOMATIC |
| Material | COPPER ALLOY BODY |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Supplementary Features | ADDITIONAL FLOW CONTROL DEVICE: STEM |
| Nominal Thread Size | 0.500 INCHES ALL ENDS IN |
| Style Designator | STRAIGHT THRU |
| Material | RUBBER FLOW CONTROL DEVICE |
| Media for Which Designed | AIR SINGLE RESPONSE |
| Thread Series Designator | NPT ALL ENDS |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Supplementary Features | ADDITIONAL FLOW CONTROL DEVICE: STEM |
| Material | RUBBER FLOW CONTROL DEVICE |
| Disk Loading Method | WEIGHT |
| Thread Series Designator | NPT ALL ENDS |
| Style Designator | STRAIGHT THRU |
| Operating Pressure | 150.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | COPPER ALLOY STEM |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| LST1S4200-253069PC151 PRIMARY | Naval Sea Systems Command (USA) |
| 3372934 PRIMARY | Hatch & Kirk, Inc. (USA) |
| LST511S4200-255499PC151 PRIMARY | Naval Sea Systems Command (USA) |
| LST1S4200-253069PC151 | Naval Ship Systems Command (USA) |
| 510-700-12 PRIMARY | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| 916605 | Rexnord Industries Llc (USA) |
| 800977PC800977G | Rexnord Industries Llc (USA) |
| 516 | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| LST511S4200-255494PC151 | Naval Ship Systems Command (USA) |
| Y0G67S4200-604973PC800964B PRIMARY | Naval Sea Systems Command (USA) |
| LST511S4200-255495PC151 | Naval Ship Systems Command (USA) |
| ATL1S4200-2PC151 PRIMARY | Naval Sea Systems Command (USA) |
| Y0G67S4200-604985PC800964B | Naval Ship Systems Command (USA) |
| LST1S4200-253054PC151 | Naval Ship Systems Command (USA) |
| LST511S4200-255499PC151 | Naval Ship Systems Command (USA) |
| LST1S4200-253054PC151 PRIMARY | Naval Sea Systems Command (USA) |
| 3372934 | General Motors Corp Electro-Motive Div (USA) |
| 7207 | Rexnord Industries Llc (USA) |
| ATL1S4200-2PC151 | Naval Ship Systems Command (USA) |
| Y0G67S4200-604973PC800964B | Naval Ship Systems Command (USA) |
NSN 4820-00-203-2548 is a Valve,check, manufactured by Naval Sea Systems Command, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-203-2548 has 23 cross-referenced part numbers: LST1S4200-253069PC151 (Naval Sea Systems Command), 3372934 (Hatch & Kirk, Inc.), LST511S4200-255499PC151 (Naval Sea Systems Command), LST1S4200-253069PC151 (Naval Ship Systems Command), 510-700-12 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc) and 18 more.
There are 11 known substitutes for 4820-00-203-2548: 6240-00-246-4909, 5315-00-527-1753, 3110-00-554-3184 and 8 more. Verify interchangeability with system specifications before substitution.
Key specifications for LST1S4200-253069PC151: Media for Which Designed: AIR SINGLE RESPONSE; Material: COPPER ALLOY SEAT; Thread Direction: RIGHT-HAND ALL ENDS; Connection Style: PLAIN, OPTIONAL END (PIPE) ALL ENDS. 25 total characteristics are documented in the Federal Logistics Information System.