The Valve,check, cataloged under National Stock Number 4820-01-136-6538, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Admiral Valve Llc Dba Cpv Manufacturing. Government technical data includes 16 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 2 commercial cross-references from 1 manufacturer, 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 | 4820-01-136-6538 |
| Primary Part Number | 681-6 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Admiral Valve Llc Dba Cpv Manufacturing |
| Status | ACTIVE |
| Thread Series Designator | UNF ALL ENDS |
| Thread Direction | RIGHT-HAND ALL ENDS |
| Maximum Operating Temp | 225.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Material | NICKEL ALLOY SEAT |
| Connection Type | THREADED EXTERNAL TUBE ALL ENDS |
| Mounting Position | HORIZONTAL |
| Flow Control Device | DISK |
| Thread Class | 2A ALL ENDS A |
| Valve Operation Method | AUTOMATIC |
| Media for Which Designed | WATER-OIL-GAS SINGLE RESPONSE |
| Style Designator | ANGLE |
| Nominal Thread Size | 2.750 INCHES ALL ENDS IN |
| Operating Pressure | 6000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Material | COPPER ALLOY BODY |
| Material | PLASTIC POLYAMIDE NYLON FLOW CONTROL DEVICE |
| Connection Style | PLAIN (TUBE) ALL ENDS |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 681-6 PRIMARY | Admiral Valve Llc Dba Cpv Manufacturing (USA) |
| 67178-1 1A25IPS | Admiral Valve Llc Dba Cpv Manufacturing (USA) |
NSN 4820-01-136-6538 is a Valve,check, manufactured by Admiral Valve Llc Dba Cpv Manufacturing, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-01-136-6538 has 2 cross-referenced part numbers: 681-6 (Admiral Valve Llc Dba Cpv Manufacturing), 67178-1 1A25IPS (Admiral Valve Llc Dba Cpv Manufacturing).
There are 10 known substitutes for 4820-01-136-6538: 5930-00-258-5453, 4730-00-278-2523, 3415-00-364-0990 and 7 more. Verify interchangeability with system specifications before substitution.
Key specifications for 681-6: Thread Series Designator: UNF ALL ENDS; Thread Direction: RIGHT-HAND ALL ENDS; Maximum Operating Temp: 225.0 FAHRENHEIT SINGLE RESPONSE DEGF; Material: NICKEL ALLOY SEAT. 16 total characteristics are documented in the Federal Logistics Information System.