The Disk,valve, cataloged under National Stock Number 4820-00-564-9285, 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 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 4820-00-564-9285 |
| Primary Part Number | 810-2177934-815-8-11-13-16 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Walworth Company |
| Status | ACTIVE |
| Outside Diameter | 2.000 INCHES NOMINAL IN |
| Style Designator | PLUG |
| Seat Angle | 75.0 DEGREES NOMINAL |
| Nominal Thread Size | 1.500 INCHES IN |
| Thread Class | 2B |
| Thread Quantity Per Inch | 16 |
| Material | STEEL CORROSION RESISTING AND PLASTIC |
| 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 |
|---|---|
| 810-2177934-815-8-11-13-16 PRIMARY | The Walworth Company (USA) |
| 810-2177934-815-8-11-13-16 PRIMARY | Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc (USA) |
| 810-2177934-815-8-11-13-16 PRIMARY | Crane Co Div Valve Div (USA) |
| Reference | Meaning |
|---|---|
| 810-2177934-81X | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 803-2177934-X8X | C/1 Advisory reference — outside the item-of-supply concept U.S. Government activity |
| 810-2177934-815-8-11-13-16 | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-00-564-9285 is a Disk,valve, manufactured by The Walworth Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-564-9285 has 3 manufacturer part numbers on file: 810-2177934-815-8-11-13-16 (The Walworth Company), 810-2177934-815-8-11-13-16 (Milwaukee Valve Co, Inc Div Milwaukee Valve Company, Llc), 810-2177934-815-8-11-13-16 (Crane Co Div Valve Div).
1 possible match (shared part number, not a government interchangeability claim): 3010-01-458-1739. Verify interchangeability with system specifications before substitution.
Key specifications for 810-2177934-815-8-11-13-16: Overall Height: 1.595 INCHES NOMINAL IN; Outside Diameter: 2.000 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.