The Disk,valve, cataloged under National Stock Number 4820-01-177-4907, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 11 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-177-4907 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Shoulder Width | 0.078 INCHES NOMINAL IN |
| Shoulder Height | 0.277 INCHES NOMINAL IN |
| Criticality Code Justification | ZZZY |
| 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 CORROSION RESISTING |
| Thread Series Designator | UNS |
| 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 |
|---|---|
| D-59075 ITEM 19 | 5/1 Secondary reference William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| 59075-C-316SS-0.5IN-PC19(SPCLN) | 5/1 Secondary reference William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| F-60589 | 3/1 Design control — primary reference William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
NSN 4820-01-177-4907 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-177-4907: Overall Height: 0.625 INCHES NOMINAL IN; Shoulder Width: 0.078 INCHES NOMINAL IN; Shoulder Height: 0.277 INCHES NOMINAL IN; Criticality Code Justification: ZZZY. 11 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 4820-01-177-4907 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.