The Disk,valve, cataloged under National Stock Number 4820-01-159-7974, is classified within Federal Supply Class 4820 (Valves, Nonpowered) of the Valves group. The manufacturer of record is Velan Valve Corp.. Government technical data includes 6 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 4820-01-159-7974 |
| Primary Part Number | 2573-50-122 |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Temp Rating | 1000.0 FAHRENHEIT MAXIMUM DEGF |
| Taper Minor Diameter | 0.506 INCHES NOMINAL IN |
| Style Designator | SOLID WEDGE |
| Taper Length | 0.968 INCHES NOMINAL IN |
| Media for Which Designed | OIL |
| Material | STEEL CORROSION RESISTING |
| 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 |
|---|---|
| 2573-50-122 PRIMARY | Velan Valve Corp. (USA) |
| 2573-50-69 | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| 23399 | D/9 Drawing number reference only Velan Valve Corp. |
| 23399-1 ITEM 7 1 IN | 5/9 Secondary reference Velan Valve Corp. |
| 2573-50-68 | C/1 Advisory reference — outside the item-of-supply concept Velan Valve Corp. |
NSN 4820-01-159-7974 is a Disk,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-01-159-7974 has 2 manufacturer part numbers on file: 2573-50-122 (Velan Valve Corp.), 2573-50-69 (Velan Valve Corp.).
Key specifications for 2573-50-122: Overall Height: 1.375 INCHES NOMINAL IN; Temp Rating: 1000.0 FAHRENHEIT MAXIMUM DEGF; Taper Minor Diameter: 0.506 INCHES NOMINAL IN; Style Designator: SOLID WEDGE. 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.