The Disk,valve, cataloged under National Stock Number 4820-00-473-9977, 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 10 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog.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 | 4820-00-473-9977 |
| Primary Part Number | A10-7944-002-002-S |
| Item Name | Disk,valve |
| FSC / FSG | 4820 / 48 — Valves, Nonpowered |
| Manufacturer | Velan Valve Corp. |
| Status | ACTIVE |
| Shoulder Width | 0.080 INCHES NOMINAL IN |
| Shoulder Height | 0.242 INCHES NOMINAL IN |
| Outside Diameter | 2.235 INCHES NOMINAL IN |
| Style Designator | PLUG |
| Seat Angle | 10.0 DEGREES NOMINAL |
| Nominal Thread Size | 2.250 INCHES IN |
| Thread Class | 2B |
| Thread Quantity Per Inch | 12 |
| Material | STEEL CORROSION RESISTING |
| Thread Series Designator | UN |
| 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 |
|---|---|
| A10-7944-002-002-S PRIMARY | Velan Valve Corp. (USA) |
| Reference | Meaning |
|---|---|
| A10-7944-2-148 | 5/9 Secondary reference Velan Valve Corp. |
| A10-7944-2-002 | 5/9 Secondary reference Velan Valve Corp. |
| A10-7944-2-52 | 5/9 Secondary reference Velan Valve Corp. |
NSN 4820-00-473-9977 is a Disk,valve, manufactured by Velan Valve Corp., classified under FSC 4820, Valves, Nonpowered. Status: active.
NSN 4820-00-473-9977 has 1 manufacturer part number on file: A10-7944-002-002-S (Velan Valve Corp.).
Key specifications for A10-7944-002-002-S: Shoulder Width: 0.080 INCHES NOMINAL IN; Shoulder Height: 0.242 INCHES NOMINAL IN; Outside Diameter: 2.235 INCHES NOMINAL IN; Style Designator: PLUG. 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.