The Disk,valve, cataloged under National Stock Number 4820-01-460-9178, 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 10 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through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-460-9178 |
| Primary Part Number | 7918-5-Y |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | The Walworth Company |
| Status | ACTIVE |
| Shank Diameter | 1.304 INCHES MINIMUM AND 1.308 INCHES MAXIMUM IN |
| Flange Seat to Disk End Height | 2.812 INCHES NOMINAL IN |
| Pressure Rating | 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Temp Rating | 500.0 FAHRENHEIT NOMINAL DEGF |
| Outside Diameter | 2.875 INCHES NOMINAL IN |
| Style Designator | POPPET |
| Seat Angle | 13.0 DEGREES NOMINAL |
| Inside Diameter | 1.000 INCHES NOMINAL IN |
| Media for Which Designed | LIQUID |
| Material | CARBON |
| 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 |
|---|---|
| 7918-5-Y | The Walworth Company (USA) |
| Reference | Meaning |
|---|---|
| 845-1889553-PC55-2.5IN | 3/2 Design control — primary reference U.S. Government activity |
NSN 4820-01-460-9178 is a Disk,valve, manufactured by The Walworth Company, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-460-9178 has 1 manufacturer part number on file: 7918-5-Y (The Walworth Company).
Key specifications for 7918-5-Y: Shank Diameter: 1.304 INCHES MINIMUM AND 1.308 INCHES MAXIMUM IN; Flange Seat to Disk End Height: 2.812 INCHES NOMINAL IN; Overall Height: 3.312 INCHES NOMINAL IN; Pressure Rating: 150.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS. 10 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.