The Valve,check, cataloged under National Stock Number 4820-00-481-6686, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Swagelok Co. Government technical data includes 24 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 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 | 4820-00-481-6686 |
| Primary Part Number | B4C1 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Swagelok Co |
| Status | ACTIVE |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Thread Class | 3A FIRST END A |
| Maximum Operating Temp | 400.0 FAHRENHEIT SINGLE RESPONSE DEGF |
| Seat Angle | 37.0 DEGREES FIRST END |
| Thread Series Designator | UNF FIRST END |
| Material | STEEL COMP 316 FLOW CONTROL DEVICE |
| Style Designator | STRAIGHT THRU |
| Nominal Thread Size | 0.437 INCHES FIRST END IN |
| Flow Control Device | POPPET |
| Nominal Thread Size | 0.250 INCHES SECOND END IN |
| Nominal Pipe Size Accommodated | 0.250 INCHES SECOND END IN |
| Disk Loading Method | SPRING |
| Operating Pressure | 3000.0 POUNDS PER SQUARE INCH (PSI) MAXIMUM SINGLE RESPONSE LBS |
| Connection Style | PLAIN (PIPE) SECOND END |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Media for Which Designed | FUEL/OIL, HYDROCARBON SINGLE RESPONSE |
| Thread Direction | RIGHT-HAND FIRST END |
| Thread Direction | RIGHT-HAND SECOND END |
| Renewable Seat Ring Type | PRESSED-IN |
| Thread Series Designator | NPT SECOND END |
| Valve Operation Method | AUTOMATIC |
| Connection Style | INVERTED FLARE (TUBE) FIRST END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 4Z-C4L-1-B | Parker-Hannifin Corp Div Instrumentation Products Division (USA) |
| B4C1 | Nupro Co (USA) |
| B4C1 PRIMARY | Swagelok Co (USA) |
NSN 4820-00-481-6686 is a Valve,check, manufactured by Swagelok Co, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-481-6686 has 3 cross-referenced part numbers: 4Z-C4L-1-B (Parker-Hannifin Corp Div Instrumentation Products Division), B4C1 (Nupro Co), B4C1 (Swagelok Co).
There is 1 known substitute for 4820-00-481-6686: 4820-01-058-4993. Verify interchangeability with system specifications before substitution.
Key specifications for B4C1: Nominal Outside Diameter Tube Accommodated: 0.250 INCHES FIRST END IN; Connection Type: THREADED EXTERNAL TUBE FIRST END; Thread Class: 3A FIRST END A; Maximum Operating Temp: 400.0 FAHRENHEIT SINGLE RESPONSE DEGF. 25 total characteristics are documented in the Federal Logistics Information System.