The Disk,valve, cataloged under National Stock Number 4820-01-043-0933, 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 7 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through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 4 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-043-0933 |
| Primary Part Number | E-33423REVA |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| Status | ACTIVE |
| Outside Diameter | 1.680 INCHES NOMINAL IN |
| Style Designator | PLUG |
| Seat Angle | 15.0 DEGREES NOMINAL |
| Nominal Thread Size | 1.000 INCHES IN |
| Thread Class | 2A A |
| Material | STEEL CORROSION RESISTING |
| Thread Series Designator | UNEF |
| 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 |
|---|---|
| E-33423REVA PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| Reference | Meaning |
|---|---|
| C67610REVAPIECE18-1 1-2IN | D/9 Drawing number reference only William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| 33423 | 5/9 Secondary reference William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
NSN 4820-01-043-0933 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 4820-01-043-0933 has 1 manufacturer part number on file: E-33423REVA (William Powell Company, the Dba Powell Valve Div the Starflo Corporation).
4 possible matches (shared part number, not a government interchangeability claim): 4820-01-236-0175, 5305-01-241-5067, 6105-01-317-3330. Verify interchangeability with system specifications before substitution.
Key specifications for E-33423REVA: Overall Height: 0.785 INCHES NOMINAL IN; Outside Diameter: 1.680 INCHES NOMINAL IN; Style Designator: PLUG; Seat Angle: 15.0 DEGREES NOMINAL. 7 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.