The Disk,valve, cataloged under National Stock Number 4820-00-773-5848, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Ingersoll-Rand Company Dba Ingersoll-Rand. Government technical data includes 5 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through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-773-5848 |
| Primary Part Number | 3W21940 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Ingersoll-Rand Company Dba Ingersoll-Rand |
| Status | ACTIVE |
| Outside Diameter | 1.375 INCHES NOMINAL IN |
| Style Designator | PLAIN |
| Inside Diameter | 0.812 INCHES NOMINAL IN |
| Media for Which Designed | AIR |
| Material | STEEL |
| 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 |
|---|---|
| W21940 | Ditta Seguino Ambrogio (ITA) |
| 3W21940 PRIMARY | Ingersoll-Rand Company Dba Ingersoll-Rand (USA) |
| 3W21940 PRIMARY | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| Reference | Meaning |
|---|---|
| 3W21940 | 5/9 Secondary reference Ingersoll Rand Co |
| 3W21940 | 3/2 Design control — primary reference U.S. Government activity |
| 3W21940 | 5/9 Secondary reference Curtiss-Wright Electro-Mechanical Corporation Dba Curtiss-Wright Steam and Air Solutions Div Steam and Air Solutions |
| 3W21940 | 5/9 Secondary reference U.S. Government activity |
| 3W21940 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
NSN 4820-00-773-5848 is a Disk,valve, manufactured by Ingersoll-Rand Company Dba Ingersoll-Rand, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-773-5848 has 3 manufacturer part numbers on file: W21940 (Ditta Seguino Ambrogio), 3W21940 (Ingersoll-Rand Company Dba Ingersoll-Rand), 3W21940 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions).
Key specifications for 3W21940: Overall Height: 0.062 INCHES NOMINAL IN; Outside Diameter: 1.375 INCHES NOMINAL IN; Style Designator: PLAIN; Inside Diameter: 0.812 INCHES NOMINAL IN. 5 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.