The Disk,valve, cataloged under National Stock Number 4820-01-238-9154, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 7 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-238-9154 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Taper Minor Diameter | 1.174 INCHES MINIMUM AND 1.182 INCHES MAXIMUM IN |
| Criticality Code Justification | ZZZY |
| Style Designator | SOLID WEDGE |
| Taper Major Diameter | 2.084 INCHES MINIMUM AND 2.104 INCHES MAXIMUM IN |
| Taper Length | 4.781 INCHES NOMINAL IN |
| Material | STEEL CORROSION RESISTING |
| Reference Number Differentiating Characteristics | MATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL F — Mutilate — Cut |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | Y |
| Reference | Meaning |
|---|---|
| 67070 PC 19 | 5/1 Secondary reference William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| 67070-E-304SS-4. 0IN-PC19(SPCLN | 3/1 Design control — primary reference William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| 66439 | 5/1 Secondary reference William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
NSN 4820-01-238-9154 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
1 possible match (shared part number, not a government interchangeability claim): 5330-01-315-2167. Verify interchangeability with system specifications before substitution.
Key specifications for 4820-01-238-9154: Taper Minor Diameter: 1.174 INCHES MINIMUM AND 1.182 INCHES MAXIMUM IN; Criticality Code Justification: ZZZY; Style Designator: SOLID WEDGE; Taper Major Diameter: 2.084 INCHES MINIMUM AND 2.104 INCHES MAXIMUM IN. 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.
NSN 4820-01-238-9154 has DEMIL Code F. Demilitarization may be required before disposal or transfer to non-military entities.
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.