The Disk,valve, cataloged under National Stock Number 4820-01-339-1672, 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 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-339-1672 |
| Primary Part Number | 059665 ITEM 19 1/2IN |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| Status | ACTIVE |
| Shoulder Width | 0.086 INCHES NOMINAL IN |
| Shoulder Height | 0.098 INCHES NOMINAL IN |
| Outside Diameter | 0.797 INCHES NOMINAL IN |
| Style Designator | PLUG |
| Seat Angle | 15.0 DEGREES NOMINAL |
| Nominal Thread Size | 0.625 INCHES IN |
| Thread Class | 2A A |
| Thread Quantity Per Inch | 22 |
| Material | STEEL |
| Thread Series Designator | UNS |
| 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 |
|---|---|
| 059665 ITEM 19 1/2IN PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| Reference | Meaning |
|---|---|
| 059665 | D/9 Drawing number reference only William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
NSN 4820-01-339-1672 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 4820-01-339-1672 has 1 manufacturer part number on file: 059665 ITEM 19 1/2IN (William Powell Company, the Dba Powell Valve Div the Starflo Corporation).
Key specifications for 059665 ITEM 19 1/2IN: Overall Height: 0.625 INCHES NOMINAL IN; Shoulder Width: 0.086 INCHES NOMINAL IN; Shoulder Height: 0.098 INCHES NOMINAL IN; Outside Diameter: 0.797 INCHES NOMINAL IN. 10 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.