The Disk,valve, cataloged under National Stock Number 4820-01-160-5928, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is The Walworth Company. Government technical data includes 8 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-01-160-5928 |
| Primary Part Number | 664010 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Walworth Company |
| Status | ACTIVE |
| Outside Diameter | 5.750 INCHES NOMINAL IN |
| Style Designator | PLUG |
| Seat Angle | 75.0 DEGREES NOMINAL |
| Nominal Thread Size | 1.750 INCHES IN |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL |
| Thread Series Designator | UN |
| 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 |
|---|---|
| 664010 PRIMARY | The Walworth Company (USA) |
| Reference | Meaning |
|---|---|
| 664010 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-160-5928 is a Disk,valve, manufactured by The Walworth Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-160-5928 has 1 manufacturer part number on file: 664010 (The Walworth Company).
1 possible match (shared part number, not a government interchangeability claim): 6250-01-251-3229. Verify interchangeability with system specifications before substitution.
Key specifications for 664010: Overall Height: 1.660 INCHES NOMINAL IN; Outside Diameter: 5.750 INCHES NOMINAL IN; Style Designator: PLUG; Seat Angle: 75.0 DEGREES NOMINAL. 8 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.