The Valve,check, cataloged under National Stock Number 4820-00-430-5583, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Danfoss Power Solutions II, Llc. Government technical data includes 25 specifications, cited from the U.S. Government catalog. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-430-5583 |
| Primary Part Number | 63X4 |
| Item Name | Valve,check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Danfoss Power Solutions II, Llc |
| Status | ACTIVE |
| Flow Control Device | BALL |
| Furnished Items and Quantity | 1 NUT AND 1 FERRULE |
| Renewable Seat Ring Type | THREADED |
| Nominal Pipe Size Accommodated | 0.125 INCHES SECOND END IN |
| Connection Style | COMPRESSION (TUBE) FIRST END |
| Connection Style | PLAIN (PIPE) SECOND END |
| Mounting Position | HORIZONTAL OR VERTICAL |
| Connection Type | THREADED EXTERNAL PIPE SECOND END |
| Connection Type | THREADED EXTERNAL TUBE FIRST END |
| Style Designator | STRAIGHT THRU |
| Nominal Outside Diameter Tube Accommodated | 0.250 INCHES FIRST END IN |
| Thread Direction | RIGHT-HAND SECOND END |
| Thread Direction | RIGHT-HAND FIRST END |
| Nominal Thread Size | 0.125 INCHES SECOND END IN |
| Nominal Thread Size | 0.438 INCHES FIRST END IN |
| Disk Loading Method | SPRING |
| Thread Class | 3A FIRST END A |
| Thread Quantity Per Inch | 24 FIRST END |
| Thread Quantity Per Inch | 27 SECOND END |
| Material | COPPER ALLOY BODY |
| Material | COPPER ALLOY FLOW CONTROL DEVICE |
| Material | COPPER ALLOY SEAT |
| Thread Series Designator | NPTF SECOND END |
| Thread Series Designator | UNS FIRST END |
| Valve Operation Method | AUTOMATIC |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 002-2204 | Danfoss Power Solutions II, Llc (USA) |
| W63X4 | Danfoss Power Solutions II, Llc (USA) |
| 63X4 PRIMARY | Danfoss Power Solutions II, Llc (USA) |
| Reference | Meaning |
|---|---|
| 63X4 | 5/9 Secondary reference Dana Corp Weatherhead Div |
| W63X4 | 5/9 Secondary reference Bros Inc |
| W63X4 | 5/9 Secondary reference Dana Corp Weatherhead Div |
| 002-2204 | 5/9 Secondary reference Dana Corp Weatherhead Div |
| 63F | 5/9 Secondary reference Imperial |
| 163420 | 5/9 Secondary reference Stant Corp Edelmann Div |
NSN 4820-00-430-5583 is a Valve,check, manufactured by Danfoss Power Solutions II, Llc, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-430-5583 has 3 manufacturer part numbers on file: 002-2204 (Danfoss Power Solutions II, Llc), W63X4 (Danfoss Power Solutions II, Llc), 63X4 (Danfoss Power Solutions II, Llc).
1 possible match (shared part number, not a government interchangeability claim): 4820-00-715-3448. Verify interchangeability with system specifications before substitution.
Key specifications for 63X4: Flow Control Device: BALL; Furnished Items and Quantity: 1 NUT AND 1 FERRULE; Renewable Seat Ring Type: THREADED; Nominal Pipe Size Accommodated: 0.125 INCHES SECOND END IN. 25 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.