The Disk,valve, cataloged under National Stock Number 4820-01-201-2897, 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10 specifications, cited from the U.S. Government catalog. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-201-2897 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Status | ACTIVE |
| Pressure Rating | 100.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS |
| Style Designator | SOLID WEDGE |
| Material Document and Classification | ASTM B61 NATIONAL SPEC SINGLE MATERIAL RESPONSE |
| Taper Major Diameter | 1.997 INCHES NOMINAL IN |
| Nominal Thread Size | 0.750 INCHES IN |
| Taper Length | 3.281 INCHES NOMINAL IN |
| Media for Which Designed | GAS OR OIL OR WATER |
| Thread Class | 3B |
| Material | COPPER ALLOY 922 |
| 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 |
|---|---|
| DD4589 PIECE 3 2 1/2 INCH | 3/2 Design control — primary reference U.S. Government activity |
| D2-213-82-0001 PC 3 | 5/2 Secondary reference U.S. Government activity |
| DD4589 | D/9 Drawing number reference only U.S. Government activity |
| D2-213-82-0001 | D/9 Drawing number reference only U.S. Government activity |
NSN 4820-01-201-2897 is a Disk,valve, classified under FSC 4820, Valves, Nonpowered. Status: active.
Key specifications for 4820-01-201-2897: Overall Height: 4.031 INCHES NOMINAL IN; Pressure Rating: 100.0 POUNDS PER SQUARE INCH (PSI) NOMINAL LBS; Style Designator: SOLID WEDGE; Material Document and Classification: ASTM B61 NATIONAL SPEC SINGLE MATERIAL RESPONSE. 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.