The Disk,valve, cataloged under National Stock Number 4820-01-455-3881, 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 4 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through both NSN and commercial part number lookups. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-455-3881 |
| Primary Part Number | 21054529174400 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| Status | ACTIVE |
| Temp Rating | 500.0 FAHRENHEIT NOMINAL DEGF |
| Style Designator | SOLID WEDGE |
| Media for Which Designed | HYDRAULIC FLUID |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 21054529174400 PRIMARY | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| 039009 PC19 | William Powell Company, the Dba Powell Valve Div the Starflo Corporation (USA) |
| Reference | Meaning |
|---|---|
| 54529 | C/1 Advisory reference — outside the item-of-supply concept William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| 039007 PC 19 | C/1 Advisory reference — outside the item-of-supply concept William Powell Company, the Dba Powell Valve Div the Starflo Corporation |
| 21054529174400 | 5/9 Secondary reference Mutual Mfg and Supply Co |
| 54529 | 5/9 Secondary reference Mutual Mfg and Supply Co |
NSN 4820-01-455-3881 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 4820-01-455-3881 has 2 manufacturer part numbers on file: 21054529174400 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation), 039009 PC19 (William Powell Company, the Dba Powell Valve Div the Starflo Corporation).
Key specifications for 21054529174400: Temp Rating: 500.0 FAHRENHEIT NOMINAL DEGF; Style Designator: SOLID WEDGE; Special Features: FOR GATE CLASS 150LB SZ 2.500 IN. LBS; Media for Which Designed: HYDRAULIC FLUID. 4 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.