The Disk,valve, cataloged under National Stock Number 4820-01-151-9016, 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 6 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-151-9016 |
| Primary Part Number | 131789-200-00-U2 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| Status | ACTIVE |
| Taper Minor Diameter | 1.562 INCHES NOMINAL IN |
| Style Designator | SOLID WEDGE |
| Taper Major Diameter | 2.156 INCHES NOMINAL IN |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Taper Length | 3.375 INCHES NOMINAL IN |
| Material | STEEL |
| 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 |
|---|---|
| 057361 ITEM 26 | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| 131789-200-00-U2 PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| Reference | Meaning |
|---|---|
| 057361 | D/9 Drawing number reference only William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| 131789 | 5/9 Secondary reference William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
NSN 4820-01-151-9016 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 4820-01-151-9016 has 2 manufacturer part numbers on file: 057361 ITEM 26 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation), 131789-200-00-U2 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation).
Key specifications for 131789-200-00-U2: Taper Minor Diameter: 1.562 INCHES NOMINAL IN; Style Designator: SOLID WEDGE; Taper Major Diameter: 2.156 INCHES NOMINAL IN; Seat Angle: 45.0 DEGREES NOMINAL. 6 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.