The Valve,check, cataloged under National Stock Number 4820-00-402-9481, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Imperial. Government technical data includes 20 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 | 4820-00-402-9481 |
| Primary Part Number | 43F1-4X1-8 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — No Item Name Available |
| Manufacturer | Imperial |
| Status | ACTIVE |
| Thread Direction | RIGHT-HAND FIRST END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Disk Loading Method | SPRING |
| Nominal Thread Size | 0.437 INCHES FIRST END IN |
| Nominal Thread Size | 0.125 INCHES SECOND END IN |
| Flow Control Device | BALL |
| Thread Series Designator | UNF FIRST END |
| Nominal Pipe Size Accommodated | 0.125 INCHES SECOND END IN |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Quantity Per Inch | 27 SECOND END |
| Valve Operation Method | AUTOMATIC |
| Test Data Document | 97403-13206E7470 DRAWING (THIS IS THE BASIC GOVERNING DRAWING, SUCH AS A CONTRACTOR DRAWING, ORIGINAL EQUIPMENT MANUFACTURER DRAWING, ETC.; EXCLUDES ANY SPECIFICATION, STANDARD OR OTHER DOCUMENT THAT MAY BE REFERENCED IN A BASIC GOVERNING DRAWING) |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Thread Quantity Per Inch | 20 FIRST END |
| Style Designator | STRAIGHT THRU |
| Thread Class | 2A FIRST END A |
| Connection Style | FLARED (TUBE) FIRST END |
| Seat Angle | 45.0 DEGREES FIRST END |
| Thread Series Designator | NPTF SECOND END |
| Acquisition Status | ACTIVE |
| HAZMAT | No |
| Part Number | Manufacturer |
|---|---|
| 43F1-4X1-8 | Imperial (USA) |
| 13206E7470 | Met-Pro Corporation (USA) |
| 13206E7470 | Cecom Lr Center (USA) |
NSN 4820-00-402-9481 is a Valve,check, manufactured by Imperial, classified under FSC 4820 (No Item Name Available). Status: active.
NSN 4820-00-402-9481 has 3 cross-referenced part numbers: 43F1-4X1-8 (Imperial), 13206E7470 (Met-Pro Corporation), 13206E7470 (Cecom Lr Center).
There is 1 known substitute for 4820-00-402-9481: 4820-00-274-5107. Verify interchangeability with system specifications before substitution.
Key specifications for 43F1-4X1-8: Thread Direction: RIGHT-HAND FIRST END; Connection Type: THREADED EXTERNAL TUBE FIRST END; Disk Loading Method: SPRING; Nominal Thread Size: 0.437 INCHES FIRST END IN. 20 total characteristics are documented in the Federal Logistics Information System.