The Disk,valve, cataloged under National Stock Number 4820-00-734-5441, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is William Powell Company, the Dba Powell Valve Div the Starflo Corporation. Government technical data includes 8 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-734-5441 |
| Primary Part Number | 57139PC4IN |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| Status | ACTIVE |
| Flange Seat to Disk End Height | 0.750 INCHES NOMINAL IN |
| Pressure Rating | 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Outside Diameter | 5.125 INCHES NOMINAL IN |
| Nominal Thread Size | 0.625 INCHES IN |
| Under Flange Height | 1.375 INCHES NOMINAL IN |
| Thread Class | 2A A |
| Material | STEEL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| 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 |
|---|---|
| 023466-2-3PC4IN | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| 57139PC4IN PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
NSN 4820-00-734-5441 is a Disk,valve, manufactured by William Powell Company, the Dba Powell Valve Div the Starflo Corporation, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-734-5441 has 2 manufacturer part numbers on file: 023466-2-3PC4IN (William Powell Company, the Dba Powell Valve Div the Starflo Corporation), 57139PC4IN (William Powell Company, the Dba Powell Valve Div the Starflo Corporation).
Key specifications for 57139PC4IN: Flange Seat to Disk End Height: 0.750 INCHES NOMINAL IN; Pressure Rating: 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Outside Diameter: 5.125 INCHES NOMINAL IN; Nominal Thread Size: 0.625 INCHES IN. 8 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.