The Valve,stop-Check, cataloged under National Stock Number 4820-01-192-1351, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions. Government technical data includes 6 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through both NSN and commercial part number lookups. 6 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-192-1351 |
| Primary Part Number | W103324 |
| Item Name | Valve,stop-Check |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| Status | ACTIVE |
| Flow Control Device | DISKDISK |
| Supplementary Features | VALVE OPERATION METHOD: AIR |
| Connection Type | THREADED INTERNAL PIPE ALL ENDS |
| Nominal Thread Size | 1.875 INCHES ALL ENDS IN |
| Media for Which Designed | WATER, FRESH SINGLE RESPONSE |
| Material | COPPER ALLOY BODY |
| 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 |
|---|---|
| F24901FIND973 | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| W103324 PRIMARY | Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions (USA) |
| UP2-1250-6NCUMIL PRIMARY | Lexair Inc (USA) |
| Reference | Meaning |
|---|---|
| UP2-1250-6NC-U-MIL | 5/9 Secondary reference I-T-E Imperial Corp Subsidiary of Gould Inc Airmatic/beckett Harcum Div |
| W103324 | 5/9 Secondary reference U.S. Government activity |
| F24901FIND973 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| UP2-1250-6NC-U- | C/1 Advisory reference — outside the item-of-supply concept I-T-E Imperial Corp Subsidiary of Gould Inc Airmatic/beckett Harcum Div |
| W103324 | 5/9 Secondary reference Siemens Energy, Inc. Dba Dresser-Rand |
| F24901FIND973 | 5/9 Secondary reference U.S. Government activity |
NSN 4820-01-192-1351 is a Valve,stop-Check, manufactured by Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions, classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-192-1351 has 3 manufacturer part numbers on file: F24901FIND973 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions), W103324 (Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions), UP2-1250-6NCUMIL (Lexair Inc).
Key specifications for W103324: Flow Control Device: DISKDISK; Supplementary Features: VALVE OPERATION METHOD: AIR; Connection Type: THREADED INTERNAL PIPE ALL ENDS; Nominal Thread Size: 1.875 INCHES ALL ENDS IN. 6 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.