The Disk,valve, cataloged under National Stock Number 4820-00-703-1790, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. Government technical data includes 10 specifications, cited from the U.S. Government catalog. 8 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-00-703-1790 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Shoulder Width | 0.560 INCHES NOMINAL IN |
| Shoulder Height | 2.188 INCHES NOMINAL IN |
| Outside Diameter | 0.750 INCHES NOMINAL IN |
| Style Designator | PLUG |
| Seat Angle | 45.0 DEGREES NOMINAL |
| Nominal Thread Size | 0.375 INCHES IN |
| Media for Which Designed | STEAM |
| Thread Class | 2B |
| Material | STEEL |
| Thread Series Designator | UNIFIED NATIONAL COARSE (UNC) |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| S583REVAITEM1 | 5/9 Secondary reference U.S. Government activity |
| NM180PCALL | 5/9 Secondary reference U.S. Government activity |
| NM180-1 | 5/9 Secondary reference U.S. Government activity |
| NM0180-1 | C/1 Advisory reference — outside the item-of-supply concept Curtiss-Wright Electro-Mechanical Corp Dba Steam & Air Solutions Div Curtiss-Wright Steam and Air Solutions |
| S557PC3 | 5/9 Secondary reference U.S. Government activity |
| NM180 | D/9 Drawing number reference only U.S. Government activity |
| 575-4810-1896471REVAITEM1 | 5/2 Secondary reference U.S. Government activity |
| NM0180-1 | 3/9 Design control — primary reference Siemens Government Technologies, Inc. Dba Sgt Dresser-Rand Div Sgt Dresser-Rand |
NSN 4820-00-703-1790 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-00-703-1790: Overall Height: 2.555 INCHES NOMINAL IN; Shoulder Width: 0.560 INCHES NOMINAL IN; Shoulder Height: 2.188 INCHES NOMINAL IN; Outside Diameter: 0.750 INCHES NOMINAL IN. 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.